APA (7th ed.) Citation

Tomás, 1. d. A., Thomas, A., & Sullivan, D. J. (1952). The Summa theologica of Saint Thomas Aquinas. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Tomás, 1225?-1274 de Aquino, Aquinas Thomas, and Daniel J. Sullivan. The Summa Theologica of Saint Thomas Aquinas. Chicago: Encyclopaedia Britannica, 1952.

MLA (8th ed.) Citation

Tomás, 1225?-1274 de Aquino, et al. The Summa Theologica of Saint Thomas Aquinas. Encyclopaedia Britannica, 1952.