APA (7e ed.) Bronvermelding

Não informado. (1981). ACP observer. American College of Physicians.

Chicago (17e ed.) Bronvermelding

Não informado. ACP Observer. Philadelphia, Pa: American College of Physicians, 1981.

MLA (8e ed.) Bronvermelding

Não informado. ACP Observer. American College of Physicians, 1981.

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