Cita APA (7a ed.)

Ludwig, E. (1956). Abraham Lincoln and the times that tried his soul. fawcett World Library.

Cita Chicago Style (17a ed.)

Ludwig, Emil. Abraham Lincoln and the Times That Tried His Soul. New York: fawcett World Library, 1956.

Cita MLA (9a ed.)

Ludwig, Emil. Abraham Lincoln and the Times That Tried His Soul. fawcett World Library, 1956.