APA (7e ed.) Bronvermelding

Não informado. (1971). Environment information access. Environmental Information Center of Ecology Forum.

Chicago (17e ed.) Bronvermelding

Não informado. Environment Information Access. New York: Environmental Information Center of Ecology Forum, 1971.

MLA (8e ed.) Bronvermelding

Não informado. Environment Information Access. Environmental Information Center of Ecology Forum, 1971.

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