APA (7e ed.) Bronvermelding

Não informado. (1981). Environmental Education and Information. University of Salford.

Chicago (17e ed.) Bronvermelding

Não informado. Environmental Education and Information. Salford, Inglaterra: University of Salford, 1981.

MLA (8e ed.) Bronvermelding

Não informado. Environmental Education and Information. University of Salford, 1981.

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