APA

Townsend C. H., . (1934). The fur seal of the Galápagos Islands, Arctocephalus galapagoensis Heller. : .

Chicago

Townsend C H, . 1934. The fur seal of the Galápagos Islands, Arctocephalus galapagoensis Heller. : .

Harvard

Townsend C. H., . (1934). The fur seal of the Galápagos Islands, Arctocephalus galapagoensis Heller. : .

MLA

Townsend C H, . The fur seal of the Galápagos Islands, Arctocephalus galapagoensis Heller. : . 1934.