@@ -48,11 +48,11 @@
 from google.cloud import exceptions
 from google.cloud.client import ClientWithProject
 
+from google.cloud.bigquery._helpers import _del_sub_prop
 from google.cloud.bigquery._helpers import _get_sub_prop
 from google.cloud.bigquery._helpers import _record_field_to_json
 from google.cloud.bigquery._helpers import _str_or_none
 from google.cloud.bigquery._helpers import _verify_job_config_type
-from google.cloud.bigquery._helpers import _del_sub_prop
 from google.cloud.bigquery._http import Connection
 from google.cloud.bigquery import _pandas_helpers
 from google.cloud.bigquery.dataset import Dataset
@@ -1619,6 +1619,7 @@ def create_job(self, job_config, retry=DEFAULT_RETRY, timeout=None):
 )
 destination = _get_sub_prop(job_config, ["load", "destinationTable"])
 source_uris = _get_sub_prop(job_config, ["load", "sourceUris"])
+destination = TableReference.from_api_repr(destination)
 return self.load_table_from_uri(
 source_uris,
 destination,
@@ -1631,9 +1632,9 @@ def create_job(self, job_config, retry=DEFAULT_RETRY, timeout=None):
 job_config
 )
 destination = _get_sub_prop(job_config, ["copy", "destinationTable"])
+destination = TableReference.from_api_repr(destination)
 sources = []
 source_configs = _get_sub_prop(job_config, ["copy", "sourceTables"])
-
 if source_configs is None:
 source_configs = [_get_sub_prop(job_config, ["copy", "sourceTable"])]
 for source_config in source_configs:
@@ -1651,10 +1652,13 @@ def create_job(self, job_config, retry=DEFAULT_RETRY, timeout=None):
 job_config
 )
 source = _get_sub_prop(job_config, ["extract", "sourceTable"])
-source_type = "Table"
-if not source:
+if source:
+source_type = "Table"
+source = TableReference.from_api_repr(source)
+else:
 source = _get_sub_prop(job_config, ["extract", "sourceModel"])
 source_type = "Model"
+source = ModelReference.from_api_repr(source)
 destination_uris = _get_sub_prop(job_config, ["extract", "destinationUris"])
 return self.extract_table(
 source,

@@ -3573,21 +3573,28 @@ def test_delete_table_w_not_found_ok_true(self):
 
 conn.api_request.assert_called_with(method="DELETE", path=path, timeout=None)
 
-def _create_job_helper(self, job_config, client_method):
+def _create_job_helper(self, job_config):
+from google.cloud.bigquery import _helpers
+
 creds = _make_credentials()
 http = object()
 client = self._make_one(project=self.PROJECT, credentials=creds, _http=http)
 
-client._connection = make_connection()
-rf1 = mock.Mock()
-get_config_ = mock.(
-"google.cloud.bigquery.job._JobConfig.from_api_repr", return_value=rf1,
-)
-load_ = mock.(client_method, autospec=True)
+RESOURCE = {
+"jobReference": {"projectId": self.PROJECT, "jobId": mock.ANY},
+"configuration": job_config,
+}
+conn = client._connection = make_connection(RESOURCE)
+client.create_job(job_config=job_config)
+if "query" in job_config:
+_helpers._del_sub_prop(job_config, ["query", "destinationTable"])
 
-with load_ as client_method, get_config_:
-client.create_job(job_config=job_config)
-client_method.assert_called_once()
+conn.api_request.assert_called_once_with(
+method="POST",
+path="/projects/%s/jobs" % self.PROJECT,
+data=RESOURCE,
+timeout=None,
+)
 
 def test_create_job_load_config(self):
 configuration = {
@@ -3601,9 +3608,7 @@ def test_create_job_load_config(self):
 }
 }
 
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.load_table_from_uri"
-)
+self._create_job_helper(configuration)
 
 def test_create_job_copy_config(self):
 configuration = {
@@ -3623,9 +3628,7 @@ def test_create_job_copy_config(self):
 }
 }
 
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.copy_table",
-)
+self._create_job_helper(configuration)
 
 def test_create_job_copy_config_w_single_source(self):
 configuration = {
@@ -3643,9 +3646,7 @@ def test_create_job_copy_config_w_single_source(self):
 }
 }
 
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.copy_table",
-)
+self._create_job_helper(configuration)
 
 def test_create_job_extract_config(self):
 configuration = {
@@ -3658,9 +3659,7 @@ def test_create_job_extract_config(self):
 "destinationUris": ["gs://test_bucket/dst_object*"],
 }
 }
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.extract_table",
-)
+self._create_job_helper(configuration)
 
 def test_create_job_extract_config_for_model(self):
 configuration = {
@@ -3673,17 +3672,17 @@ def test_create_job_extract_config_for_model(self):
 "destinationUris": ["gs://test_bucket/dst_object*"],
 }
 }
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.extract_table",
-)
+self._create_job_helper(configuration)
 
 def test_create_job_query_config(self):
 configuration = {
-"query": {"query": "query", "destinationTable": {"tableId": "table_id"}}
+"query": {
+"query": "query",
+"destinationTable": {"tableId": "table_id"},
+"useLegacySql": False,
+}
 }
-self._create_job_helper(
-configuration, "google.cloud.bigquery.client.Client.query",
-)
+self._create_job_helper(configuration)
 
 def test_create_job_query_config_w_rateLimitExceeded_error(self):
 from google.cloud.exceptions import Forbidden