Cita APA

Schiller, K. F., Willoughby, C. P., & Crossley, J. N. (1976). Letter: Radiology and endoscopy in acute upper gastrointestinal bleeding.

Citación estilo Chicago

Schiller, K F., C P. Willoughby, y J N. Crossley. Letter: Radiology and Endoscopy in Acute Upper Gastrointestinal Bleeding. 1976.

Cita MLA

Schiller, K F., C P. Willoughby, y J N. Crossley. Letter: Radiology and Endoscopy in Acute Upper Gastrointestinal Bleeding. 1976.