APA (7e ed.) Bronvermelding

Não informado. (2004). International Development Abstracts. Geo Abstracts.

Chicago (17e ed.) Bronvermelding

Não informado. International Development Abstracts. Norwich, Inglaterra: Geo Abstracts, 2004.

MLA (8e ed.) Bronvermelding

Não informado. International Development Abstracts. Geo Abstracts, 2004.

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