APA (7e ed.) Bronvermelding

Não informado. (1972). Ecological Research Series. U.S. Environmental Protection Agency.

Chicago (17e ed.) Bronvermelding

Não informado. Ecological Research Series. Washington: U.S. Environmental Protection Agency, 1972.

MLA (8e ed.) Bronvermelding

Não informado. Ecological Research Series. U.S. Environmental Protection Agency, 1972.

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