We would suggest that some variation on the following language be included in your work to alert future users that some materials are protected by copyright and not covered by the Creative Commons license.

Front Matter (or detailed information): Except where otherwise noted, this work by [AUTHOR] is licensed under a Creative Commons Attribution (4.0) License. All logos and trademarks are property of their respective owners. Sections used under fair use doctrine (17 U.S.C. § 107) are marked. Persons who reuse such materials should ensure that they too enjoy a legal privilege to reuse those excerpts. Teachers and adopters in non-U.S. jurisdictions should rely on the appropriate education, study, and quotation provisions of their own national copyright laws.

Included with the specific instances of included material:

Short version: [Image Title/Work Tile, Work Author] used pursuant to fair use.(17 U.S.C. § 107). 

Long version: [Image Title/Work Tile, Work Author] used pursuant to fair use (17 U.S.C. § 107). Teachers and adopters in non-U.S. jurisdictions should rely on the appropriate education, study, and quotation provisions of their own national copyright laws.