This FYSE is using the same style History uses, which is "Turabian" Notes & Bibliography style (This option uses footnotes, which are formatted differently than the author/date option). See full explanation. The Turabian manual interprets Chicago Style in an easy to understand way for students. It is still Chicago Style.
Find print copies at the Library
Davis Family Library Main floor, middle shelves
A Quick Guide is available online from the publisher or you can consult the full Chicago Manual Online.
When you use the words, ideas, or creations of someone else, cite them!
See the main Citation Guide for more in-depth coverage of: