Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.