@book{9207,
	author = {Agresti, Alan.},
	title = {An introduction to categorical data analysis /},
	publisher = {Wiley-Interscience,},
	year = {c2007.},
	address = {Hoboken, NJ :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0826/2006042138-b.html}
}