Research base is the key, says Hancock.  [electronic resource] 

 -  Nursing standard (Royal College of Nursing (Great Britain) : 1987)  Dec 1993 
 - 7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>2047-9018 
<br/><br/><label>Standard No.: </label>10.7748/ns.8.11.7.s13  doi