Παραπομπή APA

Crosby, P. B. (1979). Quality is free: The art of making quality certain. New York: McGraw-Hill.

Παραπομπή Chicago Style

Crosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: McGraw-Hill, 1979.

Παραπομπή MLA

Crosby, Philip B. Quality Is Free: The Art of Making Quality Certain. New York: McGraw-Hill, 1979.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.