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/09f0aa10-9589-0135-9e7c-5b437a7964df. (Accessed December 16, 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/09f0aa10-9589-0135-9e7c-5b437a7964df
MLA citation style
Lee, Robert E. (Robert Edward), 1807-1870. Retrieved from the Digital Public Library of America <http://digitalcollections.nypl.org/items/09f0aa10-9589-0135-9e7c-5b437a7964df>.
Note: These citations are programmatically generated and may be incomplete.