Cita APA

Goodman, A. A., & Frey, C. F. (1968). Massive upper gastrointestinal hemorrhage following surgical operations.

Chicago Style Citation

Goodman, A A., i C F. Frey. Massive Upper Gastrointestinal Hemorrhage Following Surgical Operations. 1968.

Cita MLA

Goodman, A A., i C F. Frey. Massive Upper Gastrointestinal Hemorrhage Following Surgical Operations. 1968.

Atenció: Aquestes cites poden no estar 100% correctes.