TY  - BOOK
AU  - Katie Salen
AU  - Zimmerman,Eric
TI  - Rules of play: game design fundamentals 
SN  - 0262240459
AV  - QA76.76C672 SAL
PY  - 2004///
CY  - Cambridge
PB  - MIT Press
KW  - Computer games
KW  - Design
KW  - Programming
N1  - Includes bibliographical references and index
ER  -