APA-referens (7:e uppl.)
Varkonyi, R. (2012). Drupal Rules how-to: Discover the power of the Rules framework to turn your Drupal 7 installation into an action-based, interactive application. Packt Pub..
Chicago-referens (17:e uppl.)
Varkonyi, Robert. Drupal Rules How-to: Discover the Power of the Rules Framework to Turn Your Drupal 7 Installation into an Action-based, Interactive Application. Birminghan, UK: Packt Pub., 2012.
MLA-referens (9:e uppl.)
Varkonyi, Robert. Drupal Rules How-to: Discover the Power of the Rules Framework to Turn Your Drupal 7 Installation into an Action-based, Interactive Application. Packt Pub., 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.