APA (7th ed.) Citation

Thomas Aquinas, S. 1., & Pegis, A. C. (1948). Introduction to Saint Thomas Aquinas. Modern Library.

Chicago Style (17th ed.) Citation

Thomas Aquinas, Saint 1225n-1274, and Anton Charles Pegis. Introduction to Saint Thomas Aquinas. New York: Modern Library, 1948.

MLA (9th ed.) Citation

Thomas Aquinas, Saint 1225n-1274, and Anton Charles Pegis. Introduction to Saint Thomas Aquinas. Modern Library, 1948.