Crosby Steam Gage and Valve Company (Machine Shop), Charlestown, Boston, Mass. [insurance map]

Chicago citation style
Associated Mutual Insurance Companies. Crosby Steam Gage and Valve Company (Machine Shop), Charlestown, Boston, Mass. [insurance map]. 1926. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/2r36vc408. (Accessed June 21, 2018.)
APA citation style
Associated Mutual Insurance Companies, (1926) Crosby Steam Gage and Valve Company (Machine Shop), Charlestown, Boston, Mass. [insurance map]. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/2r36vc408
MLA citation style
Associated Mutual Insurance Companies. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/2r36vc408>.
Note: These citations are programmatically generated and may be incomplete.