EXERCISE CMS 4–2Chicago (CMS) documentation: notes
Example:

The student has quoted from page 625 of the book The New Media Reader, by Noah Wardrip-Fruin and Nick Montfort. The book was published by MIT Press in Cambridge, Massachusetts, in 2003. This is the first reference to the source in the paper.

1. Noah Wardrip-Fruin and Nick Montfort. The New Media Reader. (Cambridge, MA: MIT Press, 2003). 625.

1. Noah Wardrip-Fruin and Nick Montfort, The New Media Reader (Cambridge, MA: MIT Press, 2003), 625.

Commas, not periods, are used to separate elements in a Chicago-style note.