APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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