Ann Bowling <br/><br/>
Research methods in health : investigating health and health services 

 - Fourth edition 
 - Maidenhead, Berkshire, England, New  Open University Press : Mc-Graw Hill Education,   2014 
<br/><br/><label>ISBN: </label>9780335262748 
<br/><br/><label>LC Class. No.: </label>RA440.85