Wheeler, D. J. (1986). Understanding statistical process control. Statistical Process Control.
Cita Chicago (17th ed.)Wheeler, Donald J. Understanding Statistical Process Control. Knoxville, Tenn: Statistical Process Control, 1986.
Cita MLA (9th ed.)Wheeler, Donald J. Understanding Statistical Process Control. Statistical Process Control, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.