APA (7th ed.) Citation

Gerhard, D. (1981). Old Europe: A study of continuity, 1000-1800. Academic Press.

Chicago Style (17th ed.) Citation

Gerhard, Dietrich. Old Europe: A Study of Continuity, 1000-1800. New York: Academic Press, 1981.

MLA (9th ed.) Citation

Gerhard, Dietrich. Old Europe: A Study of Continuity, 1000-1800. Academic Press, 1981.