United States. Bureau of Reclamation. (1941). Western part of the United States showing location of federal irrigation projects (January 1941.). U.S. Dept. of the Interior, Bureau of Reclamation.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United States. Bureau of Reclamation. Western Part of the United States Showing Location of Federal Irrigation Projects. January 1941. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Reclamation, 1941.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)United States. Bureau of Reclamation. Western Part of the United States Showing Location of Federal Irrigation Projects. January 1941. U.S. Dept. of the Interior, Bureau of Reclamation, 1941.
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