APA (7e ed.) Bronvermelding

Kohler, R. E. Subspecies classification and biological survey, 1850s-1930s: Robert E. Kohler. Spaces of classification.(2003).

Chicago (17e ed.) Bronvermelding

Kohler, Robert E. "Subspecies Classification and Biological Survey, 1850s-1930s: Robert E. Kohler." Spaces of Classification.(2003) .

MLA (8e ed.) Bronvermelding

Kohler, Robert E. "Subspecies Classification and Biological Survey, 1850s-1930s: Robert E. Kohler." Spaces of Classification.(2003), .

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