APA

Gibbs H. L. G. P. R., . (1987). Oscillating selection on Darwin's finches. : .

Chicago

Gibbs H L Grant P R, . 1987. Oscillating selection on Darwin's finches. : .

Harvard

Gibbs H. L. G. P. R., . (1987). Oscillating selection on Darwin's finches. : .

MLA

Gibbs H L Grant P R, . Oscillating selection on Darwin's finches. : . 1987.