Parmly Billings Library spiral staircase

Chicago citation style
Unknown. Parmly Billings Library spiral staircase. 1970. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/258. (Accessed May 30, 2020.)
APA citation style
Unknown, (1970) Parmly Billings Library spiral staircase. Retrieved from the Digital Public Library of America, http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/258
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16013.contentdm.oclc.org/cdm/ref/collection/p16013coll53/id/258>.
Note: These citations are programmatically generated and may be incomplete.