APA (7th ed.) Citation

Thomas, A. (2006). Summa Theologica, Part I (Prima Pars) From the Complete American Edition. Project Gutenberg.

Chicago Style (17th ed.) Citation

Thomas, Aquinas. Summa Theologica, Part I (Prima Pars) From the Complete American Edition. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Thomas, Aquinas. Summa Theologica, Part I (Prima Pars) From the Complete American Edition. Project Gutenberg, 2006.

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