@article {24890,
	title = {International Journal of Human-Computer Studies},
	journal = {Empirical validation of the Gamification User Types Hexad scale in English and Spanish},
	year = {2019},
	url = {https://doi.org/10.1016/j.ijhcs.2018.10.002},
	author = {Gustavo F. Tondello and Alberto Mora and Andrzej Marczewski and Lennart E. Nacke}
}
