Cita APA (7a ed.)

Aliano, A., Schneeberger, F., & Montandon, P. (1979). Pean Billroth I Gastrectomy for Gastric Ulcer.

Cita Chicago Style (17a ed.)

Aliano, Artigas, Federico Schneeberger, y Pablo Montandon. Pean Billroth I Gastrectomy for Gastric Ulcer. 1979.

Cita MLA (9a ed.)

Aliano, Artigas, et al. Pean Billroth I Gastrectomy for Gastric Ulcer. 1979.