Collected Works- CMS (or multimple works in one volume)
The only part of Chicago style that I find lacking is doing a collected works. Right now, the "book section" option is the closest, but it ends up coming out with:
Duns Scoti, B. Ioannis. “Quaestiones in Libros Perihermenias Aristotelis.” In Opera Philosophica, edited by R. Andrews, G. Etzkorn, G. Gál, R. Green, T. Noone, R. Plevano, et al., 2: Washington, D.C.: The Catholic University of America, 2004.
This makes “Quaestiones in Libros Perihermenias Aristotelis.” look like an article, but its not- its a work of its own, just within a larger volume.
Duns Scoti, B. Ioannis. “Quaestiones in Libros Perihermenias Aristotelis.” In Opera Philosophica, edited by R. Andrews, G. Etzkorn, G. Gál, R. Green, T. Noone, R. Plevano, et al., 2: Washington, D.C.: The Catholic University of America, 2004.
This makes “Quaestiones in Libros Perihermenias Aristotelis.” look like an article, but its not- its a work of its own, just within a larger volume.
The latest version to which I have full access is the thirteenth edition, which says:
If the part is an entity in itself -- such as a play or long poem -- both titles are italicized.