Cita APA (7a ed.)

Harper, R. S. (1951). Lincoln and the press. McGraw-Hill Book.

Cita Chicago Style (17a ed.)

Harper, Robert S. Lincoln and the Press. New York [etc.]: McGraw-Hill Book, 1951.

Cita MLA (9a ed.)

Harper, Robert S. Lincoln and the Press. McGraw-Hill Book, 1951.