@book{70395,
	author = {Amsden, Robert T. and Butler, Howard E.},
	title = {SPC simplified :},
	publisher = {Quality Resources,},
	year = {c1998.},
	address = {New York :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0801/97047363-d.html}
}