@book{168544,
	author = {Polit, Dennise F. and Cheryl Tatano Beck},
	title = {Nursing  research : generating and assessing evidence for nursing practice/},
	publisher = { ,Wolters Kluwer},
	year = {2017.},
	address = {Philadelphia :},
	edition = {Tenth Edition.},
	note = {Includes  index}
}