@book{6,
	author = {Illowsky, Barbara, and Dean, Susan L., and OpenStax College,},
	title = {Introductory statistics /},
	publisher = {OpenStax College, Rice University,},
	year = {[2013]},
	address = {Houston, Texas :},
	note = {Includes index.},
	url = {http://102.220.23.79/cgi-bin/koha/opac-retrieve-file.pl?id=0648e9de499ada64ffa377b1319f7dce}
}