Cita APA (7th ed.)

Farkas, P. S., Knapp, A. B., & Andrianto, P. (1990). Gastroenterologi. Widya Medika.

Cita Chicago (17th ed.)

Farkas, Paul S., Albert B. Knapp, i Petrus Andrianto. Gastroenterologi. Widya Medika, 1990.

Cita MLA (9th ed.)

Farkas, Paul S., et al. Gastroenterologi. Widya Medika, 1990.