Cruz, Zenaida L. <br/><br/>
Principles and ethics of tour guiding / 
Zenaida L. Cruz. 
 - updated 
 - Manila :  Rex Book Store,  2008. 
 - vii, 164 p.:   ill. 22.3 cm. 
<br/><br/> Includes index 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-971-23-5100-6 
<br/><br/><label>LC Class. No.: </label>338.4791 C88p