APA (7e ed.) Bronvermelding

Spellerberg, I. F. (1981). Ecological evaluation for conservation. Edward Arnold.

Chicago (17e ed.) Bronvermelding

Spellerberg, Ian F. Ecological Evaluation for Conservation. Londres: Edward Arnold, 1981.

MLA (9e ed.) Bronvermelding

Spellerberg, Ian F. Ecological Evaluation for Conservation. Edward Arnold, 1981.