APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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