APA (7th ed.) Citation

Turnbull, S. R. (1985). The book of the medieval knight (1st American ed.). Crown Publishers.

Chicago Style (17th ed.) Citation

Turnbull, Stephen R. The Book of the Medieval Knight. 1st American ed. New York: Crown Publishers, 1985.

MLA (9th ed.) Citation

Turnbull, Stephen R. The Book of the Medieval Knight. 1st American ed. Crown Publishers, 1985.