APA-referens (7:e uppl.)

(2011). WordPress 3 search engine optimization optimize your website for popularity with search engines / Michael David. [electronic resource].

Chicago-referens (17:e uppl.)

WordPress 3 Search Engine Optimization Optimize Your Website for Popularity with Search Engines / Michael David. [electronic Resource]. 2011.

MLA-referens (9:e uppl.)

WordPress 3 Search Engine Optimization Optimize Your Website for Popularity with Search Engines / Michael David. [electronic Resource]. 2011.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.