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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.