@book{480374,
	author = {Marston, Louise, and Sage eBooks},
	title = {Introductory statistics for health and nursing using SPSS},
	publisher = {SAGE,},
	year = {2010.},
	address = {Los Angeles, [Calif.] ;},
	url = {http://methods.sagepub.com/book/introductory-statistics-for-health-and-nursing-using-spss}
}