Modern 20th c. printed paper

Chicago citation style
Modern 20th c. printed paper. 1978. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/509. (Accessed September 22, 2018.)
APA citation style
(1978) Modern 20th c. printed paper. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/509
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/509>.
Note: These citations are programmatically generated and may be incomplete.