TY  - BOOK
AU  - Salen,Katie
AU  - Zimmerman,Eric
TI  - Rules of play: game design fundamentals 
SN  - 0262240459
U1  - 794.81526 SAL 
PY  - 2003///
CY  - Cambridge, Mass., London
PB  - MIT
KW  - Computer and video games
KW  - Game design
ER  -