Robert E. Lee engineering notebook

Chicago citation style
Lee, Robert E. (Robert Edward), 1807-1870. Robert E. Lee engineering notebook. 1841 - 1842. Retrieved from the Digital Public Library of America, http://digitalcollections.nypl.org/items/0c6ab9c0-9589-0135-6a6f-211795d64ce5. (Accessed November 20, 2018.)
APA citation style
Lee, Robert E. (Robert Edward), 1807-1870, (1841 - 1842) Robert E. Lee engineering notebook. Retrieved from the Digital Public Library of America, http://digitalcollections.nypl.org/items/0c6ab9c0-9589-0135-6a6f-211795d64ce5
MLA citation style
Lee, Robert E. (Robert Edward), 1807-1870. Retrieved from the Digital Public Library of America <http://digitalcollections.nypl.org/items/0c6ab9c0-9589-0135-6a6f-211795d64ce5>.
Note: These citations are programmatically generated and may be incomplete.