diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
index 654413c..be071a6 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/DrupalSqlBase.php
@@ -16,14 +16,16 @@
  * A base class for source plugins using a Drupal database as a source.
  *
  * This class provides general purpose helper methods that are commonly needed
- * when writing source plugins that use a Drupal database a source, for example:
+ * when writing source plugins that use a Drupal database as a source, for
+ * example:
  * - Check if given module exists in the source database.
  * - Read Drupal configuration variables from the source database.
- * - For full list, please refer to the methods of this class.
  *
- * For available configuration keys, refer to the parent classes
- * \Drupal\migrate\Plugin\migrate\source\SqlBase and
- * \Drupal\migrate\Plugin\migrate\source\SourcePluginBase.
+ * For full list, please refer to the methods of this class.
+ *
+ * For available configuration keys, refer to the parent classes:
+ * @see \Drupal\migrate\Plugin\migrate\source\SqlBase
+ * @see \Drupal\migrate\Plugin\migrate\source\SourcePluginBase
  */
 abstract class DrupalSqlBase extends SqlBase implements ContainerFactoryPluginInterface, DependentPluginInterface {