Introduction to probability models  
Ross, Sheldon M. 
 - 9th ed. 
 - Amsterdam ; | Boston :  Academic Press,  2007 
 - xviii, 782 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9780125980623 (acid-free paper) | 0125980620 (acid-free paper) | 9780123736352 (pbk. : acid-free paper) | 0123736358 (pbk. : acid-free paper)