APA (7th ed.) Citation

Gillingham, J. (1993). Richard III: A medieval kingship. St. Martin's Press.

Chicago Style (17th ed.) Citation

Gillingham, John. Richard III: A Medieval Kingship. New York: St. Martin's Press, 1993.

MLA (9th ed.) Citation

Gillingham, John. Richard III: A Medieval Kingship. St. Martin's Press, 1993.