Não informado. (1893). Alaska Fishery and Fur Seal Industries. U.S. Fish and Wildlife Service.
Chicago-referens (17:e uppl.)Não informado. Alaska Fishery and Fur Seal Industries. Washington: U.S. Fish and Wildlife Service, 1893.
MLA-referens (8:e uppl.)Não informado. Alaska Fishery and Fur Seal Industries. U.S. Fish and Wildlife Service, 1893.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.