Lincoln, A., Douglas, S. A., & Putnam, G. H. (1912). The political debates between Abraham Lincoln and Stephen A. Douglas in the senatorial campaign of 1858 in Illinois: Together with certain preceding speeches of each at Chicago, Springfield, etc. G.P. Putnam's Sons.
Lua i Stíl Chicago (17ú heag.)Lincoln, Abraham, Stephen A. Douglas, agus George Haven Putnam. The Political Debates Between Abraham Lincoln and Stephen A. Douglas in the Senatorial Campaign of 1858 in Illinois: Together with Certain Preceding Speeches of Each at Chicago, Springfield, Etc. New York: G.P. Putnam's Sons, 1912.
Lua MLA (8ú heag.)Lincoln, Abraham, et al. The Political Debates Between Abraham Lincoln and Stephen A. Douglas in the Senatorial Campaign of 1858 in Illinois: Together with Certain Preceding Speeches of Each at Chicago, Springfield, Etc. G.P. Putnam's Sons, 1912.