Cita APA

Behrens, R., Buderus, S., Keller, K. M., & Osten-Sacken, P. v. d. (2003). Crohn's disease and ulcerative colitis in children and adolescents (2. edition.). Germany: Dr. Falk.

Citación estilo Chicago

Behrens, Rolf, Stephan Buderus, Klaus Michael Keller, y Peter von der Osten-Sacken. Crohn's Disease and Ulcerative Colitis in Children and Adolescents. 2. edition. Germany: Dr. Falk, 2003.

Cita MLA

Behrens, Rolf, Stephan Buderus, Klaus Michael Keller, y Peter von der Osten-Sacken. Crohn's Disease and Ulcerative Colitis in Children and Adolescents. 2. edition. Germany: Dr. Falk, 2003.