Cita APA (7a ed.)

Karp, G. A., & Karp, G. (2010). Make your credit cards work for you instead of you for them (1st edition.). FT Press.

Cita Chicago Style (17a ed.)

Karp, Gregory Author, y Gregory Karp. Make Your Credit Cards Work for You Instead of You for Them. 1st edition. [Place of publication not identified]: FT Press, 2010.

Cita MLA (9a ed.)

Karp, Gregory Author, y Gregory Karp. Make Your Credit Cards Work for You Instead of You for Them. 1st edition. FT Press, 2010.