@book{6908,
	author = {Mann, Prem S.},
	title = {Introductory statistics },
	publisher = {Wiley,},
	year = {2006.},
	address = {New York},
	edition = {6th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0471755303/chopaconline-20}
}