Answered By: Michael Cullen
Last Updated: Sep 11, 2017     Views: 1299

If you are using the Chicago 'notes and bibliography' style to reference St. Thomas Aquinas' Summa Theologica :

The following example about the Summa comes from the 'question and answer' section in the Chicago Manual of Style (CMOS) website, i.e. :

Q. How would you cite Aquinas’s Summa Theologica, Question 65, Article 4?

A. If you are using Chicago style, follow the form at CMOS 14.257 (14.257 Identifying numbers in classical references):

Aquinas, Summa Theologica 1.65.4.

Note that you need a part number as well as a question and article number.

Our UNDA Library page links staff and students with the complete Chicago Manual of Style (under eResources). There is also an introductory Referencing Guide with Chicago-style examples involving sacred texts and religious works: http://library.nd.edu.au/referencing/chicago/religious
Aquinas' Summa is among these :
Summa Theologiae