@inproceedings{CHI-PLAY-2014-VandenBerghe,
	author        = "Jason VandenBerghe",
	booktitle     = "{Proceedings of the First Annual Symposium on Computer-Human Interaction in Play}",
	doi           = "10.1145/2658537.2677953",
	isbn          = "978-1-4503-3014-5",
	pages         = "476",
	publisher     = "{ACM}",
	title         = "{Engines of play: how player motivation changes over time}",
	year          = 2014,
}