TY  - BOOK
AU  - Polit, Denise F.
TI  - Essentials of nursing research :methods, appraisal, and utilization /Denise F. Polit, Cheryl Tatano Beck: Methods, appraisal, and utilization
SN  - 9780781749725
PY  - 2006///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins
ER  -