APA (7e ed.) Bronvermelding

Não informado. (2002). ACOG educational bulletin. American College of Obstetricians and Gynecologists.

Chicago (17e ed.) Bronvermelding

Não informado. ACOG Educational Bulletin. Washington: American College of Obstetricians and Gynecologists, 2002.

MLA (8e ed.) Bronvermelding

Não informado. ACOG Educational Bulletin. American College of Obstetricians and Gynecologists, 2002.

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