Cita APA (7a ed.)

Aizen Tub, B., Beltrán Guañarita, J., Gutiérrez Galiana, H., & Gómez Fossati, C. (1991). Gastrointestinal bleeding of hidden origin Diagnostic value of jejunal endoscopy.

Cita Chicago Style (17a ed.)

Aizen Tub, Bernardo, Jorge Beltrán Guañarita, Horacio Gutiérrez Galiana, y Carlos Gómez Fossati. Gastrointestinal Bleeding of Hidden Origin Diagnostic Value of Jejunal Endoscopy. 1991.

Cita MLA (9a ed.)

Aizen Tub, Bernardo, et al. Gastrointestinal Bleeding of Hidden Origin Diagnostic Value of Jejunal Endoscopy. 1991.