Cita APA (7a ed.)

Piacenza, G., Czarnevicz, D., & Ferreira, C. (1994). Critical analysis of surgical treatment gastroduodenal ulcer.

Cita Chicago Style (17a ed.)

Piacenza, Guillermo, Daniel Czarnevicz, y Carlos Ferreira. Critical Analysis of Surgical Treatment Gastroduodenal Ulcer. 1994.

Cita MLA (9a ed.)

Piacenza, Guillermo, et al. Critical Analysis of Surgical Treatment Gastroduodenal Ulcer. 1994.