1. Askew S, editor. Feedback for Learning. London: Psychology Press; 2000
2. Askew S, Lodge C. Gifts, ping-pong and loops – linking feedback and learning. In: Askew S, editor. Feedback for Learning. London: Routledge; 2000:1-17
3. Gibbs G, Simpson C. Conditions under which assessment supports students’ learning. Learning and Teaching in Higher Education. 2005;1:3-1
4. Juwah C, Macfarlane-Dick D, Matthew B, Nicol D, Ross D, Smith B. Enhancing student learning through effective formative feedback
5. Scott SV. Practising what we preach: Towards a student-centred definition of feedback. Teaching in Higher Education. 2014 Jan;19(1):49-57