APA

Gibbs H. L. G. P. R., . (1989). Inbreeding in Darwin's medium ground finches (Geospiza fortis). : .

Chicago

Gibbs H L Grant P R, . 1989. Inbreeding in Darwin's medium ground finches (Geospiza fortis). : .

Harvard

Gibbs H. L. G. P. R., . (1989). Inbreeding in Darwin's medium ground finches (Geospiza fortis). : .

MLA

Gibbs H L Grant P R, . Inbreeding in Darwin's medium ground finches (Geospiza fortis). : . 1989.