Cita APA (7a ed.)

Schultz, S. G., Makhlouf, G. M., & Rauner, B. B. (1989). The gastrointestinal system. Oxford University Press.

Cita Chicago Style (17a ed.)

Schultz, Stanley G., Gabriel M. Makhlouf, y Brenda B. Rauner. The Gastrointestinal System. Oxford: Oxford University Press, 1989.

Cita MLA (9a ed.)

Schultz, Stanley G., et al. The Gastrointestinal System. Oxford University Press, 1989.