Series of nine strong, educational and vote-winning leaflets

Chicago citation style
Stelzle, Charles, 1869-1941. Series of nine strong, educational and vote-winning leaflets. ca. 1920. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/1443. (Accessed October 21, 2018.)
APA citation style
Stelzle, Charles, 1869-1941, (ca. 1920) Series of nine strong, educational and vote-winning leaflets. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/1443
MLA citation style
Stelzle, Charles, 1869-1941. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/1443>.
Note: These citations are programmatically generated and may be incomplete.