APA

Schluter D. G. P. R., . (1982). The distribution of Geospiza difficilis in relation to G. fuliginosa in the Galápagos Islands: tests of three hypotheses. : .

Chicago

Schluter D Grant P R, . 1982. The distribution of Geospiza difficilis in relation to G. fuliginosa in the Galápagos Islands: tests of three hypotheses. : .

Harvard

Schluter D. G. P. R., . (1982). The distribution of Geospiza difficilis in relation to G. fuliginosa in the Galápagos Islands: tests of three hypotheses. : .

MLA

Schluter D Grant P R, . The distribution of Geospiza difficilis in relation to G. fuliginosa in the Galápagos Islands: tests of three hypotheses. : . 1982.