APA (7e ed.) Bronvermelding

Não informado. (2017). Dissertation Abstracts. University Microfilms.

Chicago (17e ed.) Bronvermelding

Não informado. Dissertation Abstracts. Ann Arbor, Mich: University Microfilms, 2017.

MLA (8e ed.) Bronvermelding

Não informado. Dissertation Abstracts. University Microfilms, 2017.

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