Cita APA (7a ed.)

Perrone, L., Paperán, J. A., Estrugo, R., & Sojo, E. (1975). Severe gastrointestinal bleeding from gastrojejunal neophole ulcer: Fibroscopic preoperative diagnosis.

Cita Chicago Style (17a ed.)

Perrone, Luis, Juan A. Paperán, Roberto Estrugo, y Enrique Sojo. Severe Gastrointestinal Bleeding from Gastrojejunal Neophole Ulcer: Fibroscopic Preoperative Diagnosis. 1975.

Cita MLA (9a ed.)

Perrone, Luis, et al. Severe Gastrointestinal Bleeding from Gastrojejunal Neophole Ulcer: Fibroscopic Preoperative Diagnosis. 1975.