@book{37865,
	author = {Evans, James R. and Lindsay, William M.},
	title = {An introduction to Six sigma & process improvement /},
	publisher = {Cengage Learning,},
	year = {2015.},
	address = {Stamford, CT :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1503/2014934438-b.html}
}