Denny, V. (2012). Drupal 7 webform cookbook: Over 70 recipes for exploiting one of Drupal's more popular contributed modules. Packt Pub..
芝加哥风格引文Denny, Vernon. Drupal 7 Webform Cookbook: Over 70 Recipes for Exploiting One of Drupal's More Popular Contributed Modules. Birmingham, U.K.: Packt Pub., 2012.
MLA引文Denny, Vernon. Drupal 7 Webform Cookbook: Over 70 Recipes for Exploiting One of Drupal's More Popular Contributed Modules. Packt Pub., 2012.
警告：这些引文格式不一定是100％准确.