Creative Commons images are shared for use by their creators, using one of a range of specific copyright licences enabling others to build on, change or use the image. Please see the website for information: https://creativecommons.org/
Creative Commons licences require attribution to the creator and a link to the Creative Commons licence.
Example: reference
Lee, R. (2007) Education [online]. Available from: https://flic.kr/p/4ckJBL [Accessed 22 February 2019]. Licensed under CC BY-NC-ND 2.0