Vallen, Gerry K. & Vallen, Jerome J. <br/><br/>
Check – In Check – Out: Managing Hotel Operations 
By Gary K. Vallen & Jerome J. Vallen 
 -  Pearson Education South Asia Pte Ltd.  2009 
 - xvi, 603 pages, 26 cm. 
<br/><br/> Includes glossary and index 
<br/><br/><label>ISBN: </label>978-981-06-9452-5 
<br/><br/><label>Dewey Class. No.: </label>647.94068 V24 2009