Não informado. (1984). Year book of digestive diseases. Year Book Medical Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Year Book of Digestive Diseases. Chicago, Ill: Year Book Medical Publishers, 1984.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Year Book of Digestive Diseases. Year Book Medical Publishers, 1984.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.