Cita APA (7a ed.)

Olascuaga, C., Borgno, L., & González, F. (2001). Ultrasound in acute cholecystitis.

Cita Chicago Style (17a ed.)

Olascuaga, Carlos, Laura Borgno, y Fernando González. Ultrasound in Acute Cholecystitis. 2001.

Cita MLA (9a ed.)

Olascuaga, Carlos, et al. Ultrasound in Acute Cholecystitis. 2001.