Cita APA

Morgan, A. G., McAdam, W. A., & Walker, B. E. (1978). Hepatitis B and endoscopy.

Citación estilo Chicago

Morgan, A G., W A. McAdam, y B E. Walker. Hepatitis B and Endoscopy. 1978.

Cita MLA

Morgan, A G., W A. McAdam, y B E. Walker. Hepatitis B and Endoscopy. 1978.