Crosby, P. B. (1979). Quality is free: The art of making quality certain. New York: A Mentor Book.
Chicago Style citaatCrosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: A Mentor Book, 1979.
MLA citatieCrosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: A Mentor Book, 1979.
Let op: Deze citaties zijn niet altijd 100% accuraat.