توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

United States. Census Office. 6th Census, 1840, & United States. National Archives and Records Service. (1973). Schedule of mines, agriculture, commerce, manufactures, etc. of 1840 census for Illinois. National Archives.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

United States. Census Office. 6th Census, 1840, و United States. National Archives and Records Service. Schedule of Mines, Agriculture, Commerce, Manufactures, Etc. of 1840 Census for Illinois. Washington, D.C.: National Archives, 1973.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

United States. Census Office. 6th Census, 1840, و United States. National Archives and Records Service. Schedule of Mines, Agriculture, Commerce, Manufactures, Etc. of 1840 Census for Illinois. National Archives, 1973.