Crocodiles at the zoo

Chicago citation style
Rosenberg, Richard. Crocodiles at the zoo. 1977-03-18. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/57929. (Accessed December 17, 2018.)
APA citation style
Rosenberg, Richard, (1977-03-18) Crocodiles at the zoo. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/57929
MLA citation style
Rosenberg, Richard. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/57929>.
Note: These citations are programmatically generated and may be incomplete.