APA (7th ed.) Citation

United States. National Archives and Records Administration. (1991). The 1920 federal population census: Catalog of National Archives microfilm. National Archives Trust Fund Board.

Chicago Style (17th ed.) Citation

United States. National Archives and Records Administration. The 1920 Federal Population Census: Catalog of National Archives Microfilm. Washington, DC: National Archives Trust Fund Board, 1991.

MLA (8th ed.) Citation

United States. National Archives and Records Administration. The 1920 Federal Population Census: Catalog of National Archives Microfilm. National Archives Trust Fund Board, 1991.