APA (7th ed.) Citation

Thomae Aquinatis, S. Opera Omnia. Summa theologica.

Chicago Style (17th ed.) Citation

Thomae Aquinatis, Santo. Opera Omnia. Summa Theologica.

MLA (8th ed.) Citation

Thomae Aquinatis, Santo. Opera Omnia. Summa Theologica.

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