APA (7e ed.) Bronvermelding

Não informado. (1981). Progress in Obstetrics and Gynaecology. Churchill Livingstone.

Chicago (17e ed.) Bronvermelding

Não informado. Progress in Obstetrics and Gynaecology. New York: Churchill Livingstone, 1981.

MLA (8e ed.) Bronvermelding

Não informado. Progress in Obstetrics and Gynaecology. Churchill Livingstone, 1981.

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