Cita APA (7a ed.)

Mitchell, T., & Dudley, A. (2002). Acne: The 'at your fingertips' guide. Class.

Cita Chicago Style (17a ed.)

Mitchell, Tim, y Alison Dudley. Acne: The 'at Your Fingertips' Guide. London: Class, 2002.

Cita MLA (9a ed.)

Mitchell, Tim, y Alison Dudley. Acne: The 'at Your Fingertips' Guide. Class, 2002.