Bowling, Ann. <br/><br/>
Research methods in health :  investigating health and health services / 
Ann Bowling. 
 - 3rd ed. 
 - Berkshire :  McGraw Hill/Open University Press,  2009. 
 - xiii, 525 p. ;  24 cm. 
<br/><br/>References : p. 471-518. 
<br/><br/><label>ISBN: </label>9780335233649  RM212.22 0335233643  RM101.54 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research.<br/>Research design.<br/>Public health.<br/>Health Services.