@inproceedings{
author={Sotamaa Olli},
year={2007},
publisher={The University of Tokyo},
title={Perceptions of Player in Game Design Literature},
isbn={ISSN 2342-9666},
booktitle={DiGRA \&\#3907 - Proceedings of the 2007 DiGRA International Conference: Situated Play},
month={September},
url={http://www.digra.org/wp-content/uploads/digital-library/07311.59383.pdf}
}