According to the Creative Commons Wiki, below is the recommended "Best Practices" for attribution:
In the below example taken from the College of the Canyons Communications OER Textbook, "Fundamentals of Public Speaking," the authors have been included at the beginning of the chapter and the Creative Commons license has been placed at the beginning of the book as can be seen on page 2 of the text.
Screehshots taken from "Fundamentals of Public Speaking" by Tammera Stokes-Rice, Victoria Leonard & Lauren Rome, edited by Trudi Radtke is licensed under CC BY 4.0
To attribute works that have been remixed, this should be denoted through an additional statement, such as "This work is a derivative of..." or "Adapted from..." and then follow the same T.A.S.L guidelines for attribution.
Note: Attributions should be listed as close to the adapted work as is feasibly possible and if there are multiple works that should be included, they can be placed in a list under the word "Attributions," at the bottom of the page or at the end of the applicable section.