Another change from the 15th edition of The Chicago Manual of Style to the new 16th edition refers to commas used with question marks or exclamation marks.

Per CMOS 6.119 (in the 16th edition), if the title of a work ends in a question mark or exclamation point, a comma should also appear if the sentence would normally call for one. Here are their examples:

“Are You a Doctor?,” the fifth story in Will You Please Be Quiet, Please?, treats modern love.

All the band’s soundtracks–A Hard Day’s Night, Help!, Yellow Submarine, and Magical Mystery Tour–were popular.