APA (7th ed.) Citation

Munro, D. C., & Sontag, R. J. (1928). The middle ages, 395-1500 (Rev. ed.). The Century Co.

Chicago Style (17th ed.) Citation

Munro, Dana Carleton, and Raymond James Sontag. The Middle Ages, 395-1500. Rev. ed. New York: The Century Co, 1928.

MLA (9th ed.) Citation

Munro, Dana Carleton, and Raymond James Sontag. The Middle Ages, 395-1500. Rev. ed. The Century Co, 1928.