APA (7e ed.) Bronvermelding

Não informado. (1964). MENTAL RETARDATION ABSTRACTS. National Clearinghouse for Mental Health Information.

Chicago (17e ed.) Bronvermelding

Não informado. MENTAL RETARDATION ABSTRACTS. Bethesda, Md: National Clearinghouse for Mental Health Information, 1964.

MLA (8e ed.) Bronvermelding

Não informado. MENTAL RETARDATION ABSTRACTS. National Clearinghouse for Mental Health Information, 1964.

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