TY  - BOOK
AU  - Polit,Denise F.
AU  - Beck,Cheryl Tatano
TI  - Nursing research: principles and methods 
SN  - 0781737338 (hc.)
PY  - 2004///
CY  - Philadelphia
PB  - Lippincott Williams and Wilkins
KW  - Nursing Research
KW  - methods
ER  -