Edward Hitchcock letter to unidentified geologist at Bowdoin College, 1842 September 8

Chicago citation style
Hitchcock, Edward, 1793-1864. Edward Hitchcock letter to unidentified geologist at Bowdoin College, 1842 September 8. 1842-09-08. Retrieved from the Digital Public Library of America, https://acdc.amherst.edu/view/asc:643170. (Accessed June 24, 2018.)
APA citation style
Hitchcock, Edward, 1793-1864, (1842-09-08) Edward Hitchcock letter to unidentified geologist at Bowdoin College, 1842 September 8. Retrieved from the Digital Public Library of America, https://acdc.amherst.edu/view/asc:643170
MLA citation style
Hitchcock, Edward, 1793-1864. Retrieved from the Digital Public Library of America <https://acdc.amherst.edu/view/asc:643170>.
Note: These citations are programmatically generated and may be incomplete.