Fennel, David A. <br/><br/>
Ecotourism / 
David A. Fennell. 
 - 4th ed. 
 - London :  Routledge,  c2015. 
 - 336p. : ill.;25cm 
<br/><br/> includes appendix, bibliography and index 
<br/><br/><label>ISBN: </label>9780415829656 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecotourism