diff --git a/src/Form/SelectCslForm.php b/src/Form/SelectCslForm.php
index ed2ca9d..6552aeb 100644
--- a/src/Form/SelectCslForm.php
+++ b/src/Form/SelectCslForm.php
@@ -6,6 +6,8 @@
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Url;
+use Drupal\path_alias\AliasManagerInterface;
 use Drupal\islandora_citations\IslandoraCitationsHelper;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -43,6 +45,13 @@ class SelectCslForm extends FormBase {
    */
   protected $entityTypeManager;
 
+  /**
+   * Definition of path alias manager.
+   *
+   * @var \Drupal\path_alias\AliasManager
+   */
+  protected $pathAliasManager;
+
   /**
    * The logger service.
    *
@@ -56,10 +65,12 @@ class SelectCslForm extends FormBase {
   public function __construct(IslandoraCitationsHelper $citationHelper,
                               RouteMatchInterface $route_match,
                               EntityTypeManagerInterface $entity_type_manager,
+                              AliasManagerInterface $pathAliasManager,
                               LoggerInterface $logger) {
     $this->citationHelper = $citationHelper;
     $this->routeMatch = $route_match;
     $this->entityTypeManager = $entity_type_manager;
+    $this->pathAliasManager = $pathAliasManager;
     $this->logger = $logger;
   }
 
@@ -71,6 +82,7 @@ public static function create(ContainerInterface $container) {
       $container->get('islandora_citations.helper'),
       $container->get('current_route_match'),
       $container->get('entity_type.manager'),
+      $container->get('path_alias.manager'),
       $container->get('logger.factory')->get('islandora_citations')
     );
   }
@@ -234,6 +246,13 @@ private function renderCitation($csl_name): ?array {
     if (!isset($citationItems[0]->type)) {
       $citationItems[0]->type = $blockCSLType;
     }
+
+    // If no data for URL field, pass node url.
+    if (empty($citationItems[0]->URL)) {
+      $node_url = $this->pathAliasManager->getAliasByPath('/node/' . $entity->id());
+      $citationItems[0]->URL = Url::fromUserInput($node_url)->setAbsolute()->toString();
+    }
+
     $style = $this->citationHelper->loadStyle($csl_name);
     return $this->citationHelper->renderWithCiteproc($citationItems, $style);
   }