United States. Office of Education. (1931). Statistics of the Negro race. United States Department of the Interior, Office of Education, For sale by the Supt. of Docs., U.S. G.P.O..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Office of Education. Statistics of the Negro Race. [Washington, D.C.: United States Department of the Interior, Office of Education, For sale by the Supt. of Docs., U.S. G.P.O., 1931.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Office of Education. Statistics of the Negro Race. United States Department of the Interior, Office of Education, For sale by the Supt. of Docs., U.S. G.P.O., 1931.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.