APA

King W. B., International Union for Conservation of Nature and Natural Resources & International Council for Bird Preservation. (19811978). Endangered birds of the world. Washington, D.C: Published by the Smithsonian Institution Press in cooperation with the International Council for Bird Preservation.

Chicago

King Warren B, International Union for Conservation of Nature and Natural Resources and International Council for Bird Preservation. 19811978. Endangered birds of the world. Washington, D.C: Published by the Smithsonian Institution Press in cooperation with the International Council for Bird Preservation.

Harvard

King W. B., International Union for Conservation of Nature and Natural Resources and International Council for Bird Preservation. (19811978). Endangered birds of the world. Washington, D.C: Published by the Smithsonian Institution Press in cooperation with the International Council for Bird Preservation.

MLA

King Warren B, International Union for Conservation of Nature and Natural Resources and International Council for Bird Preservation. Endangered birds of the world. Washington, D.C: Published by the Smithsonian Institution Press in cooperation with the International Council for Bird Preservation. 19811978.