Deterding, S., Dixon, D., Khaled, R., Nacke, L., Sicart, M., & O’Hara, K. (2011b)

Deterding, S., Dixon, D., Khaled, R., Nacke, L., Sicart, M., & O’Hara, K. (2011b). Gamification: Using Game Design Elements in Non-Game Contexts. In Proceedings of the 2011 Annual Conference Extended Abstracts on Human Factors in Computing Systems (CHI 2011) (S. 2425–2428). Vancouver, BC, Canada: ACM.