[Letter] 1871 September 12, Lebanon, Pa. [to] Col. J. Forney, Philadelphia, Pa. / U.S. Grant.

Chicago citation style
Grant, Ulysses S. (Ulysses Simpson), 1822-1885. [Letter] 1871 September 12, Lebanon, Pa. [to] Col. J. Forney, Philadelphia, Pa. / U.S. Grant.. 1871-09-12. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/842. (Accessed December 15, 2018.)
APA citation style
Grant, Ulysses S. (Ulysses Simpson), 1822-1885, (1871-09-12) [Letter] 1871 September 12, Lebanon, Pa. [to] Col. J. Forney, Philadelphia, Pa. / U.S. Grant.. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/842
MLA citation style
Grant, Ulysses S. (Ulysses Simpson), 1822-1885. Retrieved from the Digital Public Library of America <http://cdm.lib.lehigh.edu/cdm/ref/collection/letters/id/842>.
Note: These citations are programmatically generated and may be incomplete.