United States. Bureau of the Census & United States. National Archives and Records Administration. (2002). 15th census, population, 1930. National Archives and Records Administration.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Bureau of the Census و United States. National Archives and Records Administration. 15th Census, Population, 1930. [Washington, D.C.: National Archives and Records Administration, 2002.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Bureau of the Census و United States. National Archives and Records Administration. 15th Census, Population, 1930. National Archives and Records Administration, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.