It reads the same on both sides

Chicago citation style
It reads the same on both sides. 1960. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/997. (Accessed October 21, 2018.)
APA citation style
(1960) It reads the same on both sides. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/997
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll18/id/997>.
Note: These citations are programmatically generated and may be incomplete.