APA (7th ed.) Citation

Callen, J. P. (2003). Dermatological signs of internal disease (Third edition.). Saunders.

Chicago Style (17th ed.) Citation

Callen, Jeffrey P. Dermatological Signs of Internal Disease. Third edition. Philadelphia, Pa. : London: Saunders, 2003.

MLA (9th ed.) Citation

Callen, Jeffrey P. Dermatological Signs of Internal Disease. Third edition. Saunders, 2003.