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Raczkowski, Felix: Making Points the Point: Towards a History of Ideas of Gamification. In: Mathias Fuchs, Sonia Fizek, Paolo Ruffino u.a. (Hg.): Rethinking Gamification. Lüneburg: meson press 2014, S. 141–160. DOI: https://doi.org/10.25969/mediarep/626.