APA (7e ed.) Bronvermelding

Não informado. (1972). History. Helen Dwight Reid Educational Foundation.

Chicago (17e ed.) Bronvermelding

Não informado. History. Washington: Helen Dwight Reid Educational Foundation, 1972.

MLA (8e ed.) Bronvermelding

Não informado. History. Helen Dwight Reid Educational Foundation, 1972.

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