APA (7e ed.) Bronvermelding

KREBS, C. J. (1999). Ecological methodology.-- Ed.2. An Imprint of Addison Wesley Longman.

Chicago (17e ed.) Bronvermelding

KREBS, Charles J. Ecological Methodology.-- Ed.2. California: An Imprint of Addison Wesley Longman, 1999.

MLA (9e ed.) Bronvermelding

KREBS, Charles J. Ecological Methodology.-- Ed.2. An Imprint of Addison Wesley Longman, 1999.