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References
1.
1.
Polit DF
,
Hungler BP
. Nursing Research: Principles and Methods . 6th ed.
Philadelphia : Lippincott ; 1999 .
2.
2.
Gillis A
,
Jackson W.
Research for Nurses: Methods and Interpretations . Philadelphia : F. A. Davis Co ; 2002 :69 -74 .
