Six Sigma for transactions and service / 
Parveen S. Goel 
 - 5th. ed. 
 - New York,  McGraw-Hill  2005. 
 - xviii, 555 p. :  col. ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0071443304 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Process control.<br/>Six sigma (Quality control standard)
<br/><br/><label>Dewey Class. No.: </label>658.4