APA (7e ed.) Bronvermelding

Não informado. (1980). Family Relations. National Council on Family Relations.

Chicago (17e ed.) Bronvermelding

Não informado. Family Relations. Saint Paul, Minn: National Council on Family Relations, 1980.

MLA (8e ed.) Bronvermelding

Não informado. Family Relations. National Council on Family Relations, 1980.

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