APA (7e ed.) Bronvermelding

Não informado. (1950). American Journal of Proctology. International Academy of Proctology.

Chicago (17e ed.) Bronvermelding

Não informado. American Journal of Proctology. New York: International Academy of Proctology, 1950.

MLA (8e ed.) Bronvermelding

Não informado. American Journal of Proctology. International Academy of Proctology, 1950.

Let op: Deze citaties zijn niet altijd 100% accuraat.