APA (7th ed.) Zitazioa

(2015). The art of SEO: Mastering search engine optimization / Eric Enge, Stephan Spencer, and Jessie C. Stricchiola.

Chicago Style (17th ed.) Zitazioa

The Art of SEO: Mastering Search Engine Optimization / Eric Enge, Stephan Spencer, and Jessie C. Stricchiola. 2015.

MLA (9th ed.) Zitazioa

The Art of SEO: Mastering Search Engine Optimization / Eric Enge, Stephan Spencer, and Jessie C. Stricchiola. 2015.