Cita APA (7a ed.)

Robson, E., & Freeman, E. (2012). Head first HTML and CSS (2nd ed.). O'Reilly.

Cita Chicago Style (17a ed.)

Robson, Elisabeth, y Eric Freeman. Head First HTML and CSS. 2nd ed. Sebastopol, CA: O'Reilly, 2012.

Cita MLA (8a ed.)

Robson, Elisabeth, y Eric Freeman. Head First HTML and CSS. 2nd ed. O'Reilly, 2012.