APA

Linsley E. G., Usinger R. L., . (1966). Insects of the Galápagos Islands. : .

Chicago

Linsley E G, Usinger R L, . 1966. Insects of the Galápagos Islands. : .

Harvard

Linsley E. G., Usinger R. L., . (1966). Insects of the Galápagos Islands. : .

MLA

Linsley E G, Usinger R L, . Insects of the Galápagos Islands. : . 1966.