Crosby, P. B. (1979). Quality is free: The art of making quality certain. New York: A Mentor Book.
Chicago Stili AlıntıCrosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: A Mentor Book, 1979.
MLA AlıntıCrosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: A Mentor Book, 1979.
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