Battle of Gettysburg

Chicago citation style
Hughes, M. R.Johnson, E. C.. Battle of Gettysburg. ca. 1909. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/2676. (Accessed November 21, 2018.)
APA citation style
Hughes, M. R.Johnson, E. C., (ca. 1909) Battle of Gettysburg. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/2676
MLA citation style
Hughes, M. R.Johnson, E. C.. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/ptec/id/2676>.
Note: These citations are programmatically generated and may be incomplete.