Cita APA (7a ed.)

Davis, H. (2006). Search engine optimization: Building traffic and making money with SEO (1st edition.). O'Reilly.

Cita Chicago Style (17a ed.)

Davis, Harold. Search Engine Optimization: Building Traffic and Making Money with SEO. 1st edition. [Sebastopol, California]: O'Reilly, 2006.

Cita MLA (9a ed.)

Davis, Harold. Search Engine Optimization: Building Traffic and Making Money with SEO. 1st edition. O'Reilly, 2006.