Allen, Otis D. . Map of Watertown compiled from former surveys. Watertown, Mass.: s.n., 1931. Web. 29 Jun 2022. <https://ark.digitalcommonwealth.org/ark:/50959/rf55zd162>.

Allen, O. (1931). Map of Watertown compiled from former surveys [Map]. Retrieved from https://ark.digitalcommonwealth.org/ark:/50959/rf55zd162

Allen, Otis D. . "Map of Watertown compiled from former surveys." Map. Watertown, Mass.: s.n., 1931. Digital Commonwealth, https://ark.digitalcommonwealth.org/ark:/50959/rf55zd162 (accessed June 29, 2022).