Wachusett Reservoir, top layer of Filter-bed No. 4, Sterling, Mass., Nov. 23, 1906

Chicago citation style
Massachusetts, Metropolitan Water and Sewerage Board. Wachusett Reservoir, top layer of Filter-bed No. 4, Sterling, Mass., Nov. 23, 1906. 1906-11-23. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/d217qx28h. (Accessed July 15, 2018.)
APA citation style
Massachusetts, Metropolitan Water and Sewerage Board, (1906-11-23) Wachusett Reservoir, top layer of Filter-bed No. 4, Sterling, Mass., Nov. 23, 1906. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/d217qx28h
MLA citation style
Massachusetts, Metropolitan Water and Sewerage Board. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/d217qx28h>.
Note: These citations are programmatically generated and may be incomplete.