APA (7th ed.) Citation

Thomas, v. A. (1927). Pars 1a Summa theologica..

Chicago Style (17th ed.) Citation

Thomas, von Aquin. "Pars 1a." Summa Theologica. 1927.

MLA (9th ed.) Citation

Thomas, von Aquin. "Pars 1a." Summa Theologica., 1927.

Warning: These citations may not always be 100% accurate.