@inproceedings{ author={Sun Chuen-Tsai and Lin Holin and Ho Cheng-Hong}, year={2003}, title={Game Tips as Gifts: Social Interactions and Rational Calculations in Computer Gaming}, isbn={ISSN 2342-9666}, booktitle={DiGRA \&\#3903 - Proceedings of the 2003 DiGRA International Conference: Level Up}, url={http://www.digra.org/wp-content/uploads/digital-library/05150.35057.pdf} }