APA (7e ed.) Bronvermelding

Kroeber, E., Wolff, W. H., & Bleifeld, M. (1965). Key: Biology, second edition. Workbook and laboratory manual. D. C. Heath and Co..

Chicago (17e ed.) Bronvermelding

Kroeber, Elsbeth, Walter H. Wolff, en Maurice Bleifeld. Key: Biology, Second Edition. Workbook and Laboratory Manual. [Boston]: D. C. Heath and Co., 1965.

MLA (8e ed.) Bronvermelding

Kroeber, Elsbeth, et al. Key: Biology, Second Edition. Workbook and Laboratory Manual. D. C. Heath and Co., 1965.