APA-ийн эшлэл(7 дахь хэвлэлт)

Shreves, R. (2012). Drupal search engine optimization: Drive people to your site with this supercharged guide to Drupal SEO. Packt Pub..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Shreves, Ric. Drupal Search Engine Optimization: Drive People to Your Site with This Supercharged Guide to Drupal SEO. Birmingham: Packt Pub., 2012.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Shreves, Ric. Drupal Search Engine Optimization: Drive People to Your Site with This Supercharged Guide to Drupal SEO. Packt Pub., 2012.