Waterfowl for the future :
the North American Waterfowl Management Plan.

APA Citation

Canadian Wildlife Service., U.S. Fish and Wildlife Service. (1987). Waterfowl for the future: the North American Waterfowl Management Plan. [Washington, D.C.?]: U.S. Fish and Wildlife Service/Canadian Wildlife Service.

MLA Citation

Canadian Wildlife Service, and U.S. Fish and Wildlife Service. Waterfowl for the Future: the North American Waterfowl Management Plan. [Washington, D.C.?]: U.S. Fish and Wildlife Service/Canadian Wildlife Service, 1987.