Cita APA (7a ed.)

American Physiological Society, editor, Schultz, S. G., Field, M., & Frizzell, R. (1991). The gastrointestinal system ([2nd ed.].). American Physiological Society.

Cita Chicago Style (17a ed.)

American Physiological Society, editor, Stanley G. Schultz, Michael Field, y Raymond Frizzell. The Gastrointestinal System. [2nd ed.]. Bethesda: American Physiological Society, 1991.

Cita MLA (9a ed.)

American Physiological Society, editor, et al. The Gastrointestinal System. [2nd ed.]. American Physiological Society, 1991.