TY  - BOOK
AU  - Polit, Denise F.
AU  - Beck, Cheryl Tatano.
TI  - Essentials of nursing research: methods, appraisal, and utilization
SN  - 0781749727
PY  - 2006///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins, 
KW  - Nursing research
N1  - Includes bibliographical references and index
ER  -