APA (7e ed.) Bronvermelding

Não informado. (1927). Psychological abstracts. American Psychological Association.

Chicago (17e ed.) Bronvermelding

Não informado. Psychological Abstracts. Lancaster, Pa: American Psychological Association, 1927.

MLA (8e ed.) Bronvermelding

Não informado. Psychological Abstracts. American Psychological Association, 1927.

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