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Best practices for attribution: https://wiki.creativecommons.org/wiki/Best_practices_for_attribution
"You can use CC-licensed materials as long as you follow the license conditions. One condition of all CC licenses is attribution. Here are some good (and not so good) examples of attribution."
Open Educational Resources: Good for Affordability; Better for Learning | Temple University
https://teaching.temple.edu/edvice-exchange/2016/09/open-educational-resources-good-affordability-better-learning
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