Salen, Katie. Zimmerman, Eric. <br/><br/>
Rules of play : game design fundamentals 

 - Cambridge  MIT Press  2004 
 - xv, 672 
<br/><br/><label>ISBN: </label>9780262240451 
<br/><br/><label>Dewey Class. No.: </label>794.815  SAL;1  R