Não informado. (1941). Fishery Bulletin of the Fish and Wildlife Service. U.S. Fish and Wildlife Service.
Citação do estilo Chicago (17ª ed.)Não informado. Fishery Bulletin of the Fish and Wildlife Service. Washington: U.S. Fish and Wildlife Service, 1941.
Citação MLA (8ª ed.)Não informado. Fishery Bulletin of the Fish and Wildlife Service. U.S. Fish and Wildlife Service, 1941.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.