Cita APA (7a ed.)

Enge, E., Spencer, S., & Stricchiola, J. C. (2015). The art of SEO: Mastering search engine optimization (3rd ed.). O'Reilly Media, Inc.

Cita Chicago Style (17a ed.)

Enge, Eric, Stephan Spencer, y Jessie C. Stricchiola. The Art of SEO: Mastering Search Engine Optimization. 3rd ed. Sebastopol, California: O'Reilly Media, Inc, 2015.

Cita MLA (9a ed.)

Enge, Eric, et al. The Art of SEO: Mastering Search Engine Optimization. 3rd ed. O'Reilly Media, Inc, 2015.