TY  - BOOK
AU  - Polit,D F
AU  - Beck, C T
TI  - Essentials of nursing research : : appraising evidence for nursing practice / 
SN  - 0781781531
PY  - 2009///
CY  - Philadelphia, Pa. ; ,  London : 
PB  -  Wolters Kluwer/Lippincott Williams & Wilkins, 
KW  - Nursing research
KW  - Research
KW  - Analysis
KW  - Critical appraisal
ER  -