Cita APA (7th ed.)
Dover, D., & Dafforn, E. (2011). Search engine optimization (SEO) secrets: Do what you never though possible with SEO. Wiley Pub., Inc..
Cita Chicago (17th ed.)
Dover, Danny, i Erik Dafforn. Search Engine Optimization (SEO) Secrets: Do What You Never Though Possible with SEO. Indianapolis, Ind.: Wiley Pub., Inc., 2011.
Cita MLA (9th ed.)
Dover, Danny, i Erik Dafforn. Search Engine Optimization (SEO) Secrets: Do What You Never Though Possible with SEO. Wiley Pub., Inc., 2011.
Atenció: Aquestes cites poden no estar 100% correctes.