Slave trade of Africa

Chicago citation style
Johnston, Harry Hamilton, Sir (1858-1927), Bartholomew, J. G. (John George) (1860-1920). Slave trade of Africa. 1899. Retrieved from the Digital Public Library of America, http://digitalcollections.nypl.org/items/510d47df-fd20-a3d9-e040-e00a18064a99. (Accessed May 23, 2018.)
APA citation style
Johnston, Harry Hamilton, Sir (1858-1927), Bartholomew, J. G. (John George) (1860-1920), (1899) Slave trade of Africa. Retrieved from the Digital Public Library of America, http://digitalcollections.nypl.org/items/510d47df-fd20-a3d9-e040-e00a18064a99
MLA citation style
Johnston, Harry Hamilton, Sir (1858-1927), Bartholomew, J. G. (John George) (1860-1920). Retrieved from the Digital Public Library of America <http://digitalcollections.nypl.org/items/510d47df-fd20-a3d9-e040-e00a18064a99>.
Note: These citations are programmatically generated and may be incomplete.