Não informado. (1984). Year book of digestive diseases. Year Book Medical Publishers.
Chicago-Zitierstil (17. Ausg.)Não informado. Year Book of Digestive Diseases. Chicago, Ill: Year Book Medical Publishers, 1984.
MLA-Zitierstil (8. Ausg.)Não informado. Year Book of Digestive Diseases. Year Book Medical Publishers, 1984.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.