Cita APA (7a ed.)

Estrugo, R., D'Auria, A., Gardiol, V., Bercianos, C., & Perdomo, R. (1973). Carcinoid tumors of the digestive system.

Cita Chicago Style (17a ed.)

Estrugo, Roberto, Agustín D'Auria, Valdo Gardiol, Carlos Bercianos, y Roberto Perdomo. Carcinoid Tumors of the Digestive System. 1973.

Cita MLA (9a ed.)

Estrugo, Roberto, et al. Carcinoid Tumors of the Digestive System. 1973.