Students Attending an Astronomy Class

Chicago citation style
Unknown. Students Attending an Astronomy Class. circa 1900. Retrieved from the Digital Public Library of America, http://collections.carli.illinois.edu/cdm/ref/collection/sic_photos/id/2798. (Accessed December 17, 2018.)
APA citation style
Unknown, (circa 1900) Students Attending an Astronomy Class. Retrieved from the Digital Public Library of America, http://collections.carli.illinois.edu/cdm/ref/collection/sic_photos/id/2798
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://collections.carli.illinois.edu/cdm/ref/collection/sic_photos/id/2798>.
Note: These citations are programmatically generated and may be incomplete.