APA

Thornton I. W. B., American Museum of Natural History, . (1971). Darwin's islands: a natural history of the Galápagos. Garden City, N.Y: Published for the American Museum of Natural History [by] Natural History Press.

Chicago

Thornton I W B, American Museum of Natural History, . 1971. Darwin's islands: a natural history of the Galápagos. Garden City, N.Y: Published for the American Museum of Natural History [by] Natural History Press.

Harvard

Thornton I. W. B., American Museum of Natural History, . (1971). Darwin's islands: a natural history of the Galápagos. Garden City, N.Y: Published for the American Museum of Natural History [by] Natural History Press.

MLA

Thornton I W B, American Museum of Natural History, . Darwin's islands: a natural history of the Galápagos. Garden City, N.Y: Published for the American Museum of Natural History [by] Natural History Press. 1971.