Crosby, Philip B. <br/><br/>
Quality is Free :  the Art of Making Quality Certain / 
by Philip B. Crosby. 
 - New York and Scarborough,Ontario :  A Mentor Book New American Library/NEL Penguin,  1980. 
 - XI, 270 s. ;  18 cm. 
<br/><br/><label>ISBN: </label>0451625854 
<br/><br/><label>Uniwersalna Klasyfikacja Dziesiętna: </label> 005.6