Cita APA (7th ed.)

ebrary, Inc, Plevris, J. N., & Howden, C. W. (2012). Problem-based approach to gastroenterology and hepatology. Wiley-Blackwell.

Cita Chicago (17th ed.)

ebrary, Inc, John N. Plevris, i Colin W. Howden. Problem-based Approach to Gastroenterology and Hepatology. Chichester, U.K.: Wiley-Blackwell, 2012.

Cita MLA (9th ed.)

ebrary, Inc, et al. Problem-based Approach to Gastroenterology and Hepatology. Wiley-Blackwell, 2012.