@book{2926,
	author = {Morgan, George A. and Leech, Nancy L.},
	title = {SPSS for introductory statistics: use and interpretation. /},
	publisher = {Lawrence Erlbaum Associates,},
	year = {2007.},
	address = {London:},
	edition = {3rd ed.},
	note = {Includes index and appendices.}
}