^"Massachusetts". Official Congressional Directory: 64th Congress (2nd ed.). Washington DC: Government Printing Office. 1916.
^Commonwealth of Massachusetts (1921), "Population of Congressional Districts", Population of Massachusetts as determined by the fourteenth census of the United States 1920, Boston: Wright & Potter
^Commonwealth of Massachusetts (1941), "Population of Congressional Districts", Population of Massachusetts as determined by the sixteenth census of the United States, 1940, Boston: Wright & Potter, OCLC 10056477, House No. 2849
^"Seventh Congress March 4, 1801 to March 3, 1803". Office of the Historian, United States House of Representatives. Retrieved January 11, 2019 – via History.house.gov.
^"Eighth Congress March 4, 1803 to March 3, 1805". Office of the Historian, United States House of Representatives. Retrieved January 11, 2019 – via History.house.gov.
^"Tenth Congress March 4, 1807 to March 3, 1809". Office of the Historian, United States House of Representatives. Retrieved January 11, 2019 – via History.house.gov.
^"Thirteenth Congress March 4, 1813 to March 3, 1815". Office of the Historian, United States House of Representatives. Retrieved January 11, 2019 – via History.house.gov.
^L.A. Coolidge (1897). "Massachusetts". Official Congressional Directory: Fifty-Fifth Congress. Washington DC: Government Printing Office.
^A.J. Halford (1903). "Massachusetts". Official Congressional Directory: Fifty-Eighth Congress. Washington DC: Government Printing Office.
^A.J. Halford (1909). "Massachusetts". Congressional Directory: 60th Congress (2nd ed.). Washington DC: Government Printing Office.
Referencesedit
Martis, Kenneth C. (1989). The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
Martis, Kenneth C. (1982). The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
Congressional Biographical Directory of the United States 1774–present
"Our Campaigns - United States - Massachusetts - MA - District 12". www.ourcampaigns.com. Retrieved December 31, 2020.