APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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