APA (7th ed.) Zitazioa
Drossman, D. A., Grimm, I. S., & Shaheen, N. J. (2005). Handbook of gastroenterologic procedures (Fourth edition.). Lippincott Williams & Wilkins.
Chicago Style (17th ed.) Zitazioa
Drossman, Douglas A., Ian S. Grimm, eta Nicholas J. Shaheen. Handbook of Gastroenterologic Procedures. Fourth edition. Philadelphia: Lippincott Williams & Wilkins, 2005.
MLA (9th ed.) Zitazioa
Drossman, Douglas A., et al. Handbook of Gastroenterologic Procedures. Fourth edition. Lippincott Williams & Wilkins, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.