Cita APA (7th ed.)

ebrary, Inc, Sung, J. J. Y., Kuipers, E. J., & Barkun, A. (2012). Gastrointestinal bleeding (2nd ed.). Wiley-Blackwell.

Cita Chicago (17th ed.)

ebrary, Inc, Joseph J. Y. Sung, Ernst J. Kuipers, i Alan Barkun. Gastrointestinal Bleeding. 2nd ed. Chichester, West Sussex: Wiley-Blackwell, 2012.

Cita MLA (9th ed.)

ebrary, Inc, et al. Gastrointestinal Bleeding. 2nd ed. Wiley-Blackwell, 2012.