APA (7th ed.) Citation

Johnson, A. (1970). Stephen A. Douglas: A study in American politics. Da Capo Press.

Chicago Style (17th ed.) Citation

Johnson, Allen. Stephen A. Douglas: A Study in American Politics. New York: Da Capo Press, 1970.

MLA (9th ed.) Citation

Johnson, Allen. Stephen A. Douglas: A Study in American Politics. Da Capo Press, 1970.