Pricing models and Motivations for MMO play

@Conference{digra353, title ="Pricing models and Motivations for MMO play", year = "2007", author = "Nojima, Miho", publisher = "DiGRA", address = "Tampere", howpublished = "\url{https://dl.digra.org/index.php/dl/article/view/353}", booktitle = "Proceedings of DiGRA 2007 Conference: Situated Play"}