Cita APA (7a ed.)

Parma, D., Armand Ugon, C., Ant´unez, C., Otazu, H., Farcic, A., & Delgado, B. (1980). Acute cholecystitis: Review of 500 observations.

Cita Chicago Style (17a ed.)

Parma, Dante, César Armand Ugon, Carlos Ant´unez, Heber Otazu, Antonio Farcic, y Bolívar Delgado. Acute Cholecystitis: Review of 500 Observations. 1980.

Cita MLA (9a ed.)

Parma, Dante, et al. Acute Cholecystitis: Review of 500 Observations. 1980.