Modern 20th c. printed paper

Chicago citation style
Modern 20th c. printed paper. 20th century. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/518. (Accessed April 26, 2018.)
APA citation style
(20th century) Modern 20th c. printed paper. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/518
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/dp/id/518>.
Note: These citations are programmatically generated and may be incomplete.