1. Cross, N.: Design Thinking: Understanding How Designers Think and Work. Berg (2011). ISBN 9781847886361
2. Chakrabarti, A.: Creative engineering design, presentation slides. Lecture Notes for the National Programme on Technology Enhanced Learning (NPTEL), India. Available at http://nptel.ac.in/courses/107108010/ (2013)
3. Tekinbas, K.S., Zimmerman, E.: Rules of Play, pp. 1–90. The MIT Press, Cambridge (2003)
4. Kapp, K.M., Blair, L., Mesch, R.: The Gamification of Learning and Instruction Fieldbook. Wiley, New York (2013)
5. UNESCO: 47 million youth in India drop out of school by 10th standard (2016). Available at: https://casi.sas.upenn.edu/indusscitech/unesco-47-million-youth-india-drop-out-school-10th-standard