Não informado. (1934). American Journal of Digestive Diseases and Nutrition. American Gastro-Enterological Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Journal of Digestive Diseases and Nutrition. Fort Wayne, Ind: American Gastro-Enterological Association, 1934.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Journal of Digestive Diseases and Nutrition. American Gastro-Enterological Association, 1934.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.