TY  - BOOK
AU  - Polit,Denise F.
AU  - Beck,Cheryl Tatano
TI  - Essentials of nursing research: appraising evidence for nursing practice 
SN  - 0781781534 :
PY  - 2010///
CY  - New York
PB  - Wolters Kluwer
KW  - Nursing
KW  - Research
ER  -