APA

Laycock G., American Museum of Natural History, . (1966). The alien animals. Garden City, N.Y: Published for the American Museum of Natural History [by] the Natural History Press.

Chicago

Laycock George, American Museum of Natural History, . 1966. The alien animals. Garden City, N.Y: Published for the American Museum of Natural History [by] the Natural History Press.

Harvard

Laycock G., American Museum of Natural History, . (1966). The alien animals. Garden City, N.Y: Published for the American Museum of Natural History [by] the Natural History Press.

MLA

Laycock George, American Museum of Natural History, . The alien animals. Garden City, N.Y: Published for the American Museum of Natural History [by] the Natural History Press. 1966.