An opossum sitting on a dead tree.

Chicago citation style
An opossum sitting on a dead tree.. 1938 May 6. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/9038. (Accessed October 14, 2019.)
APA citation style
(1938 May 6) An opossum sitting on a dead tree.. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/9038
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/9038>.
Note: These citations are programmatically generated and may be incomplete.