APA (7e ed.) Bronvermelding

Não informado. (1976). Dissertation abstracts international. University Microfilms International.

Chicago (17e ed.) Bronvermelding

Não informado. Dissertation Abstracts International. London: University Microfilms International, 1976.

MLA (8e ed.) Bronvermelding

Não informado. Dissertation Abstracts International. University Microfilms International, 1976.

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