APA-referens (7:e uppl.)

Smith, G. (2001). Statistical process control and quality improvement (4th ed.). Prentice Hall.

Chicago-referens (17:e uppl.)

Smith, Gerald. Statistical Process Control and Quality Improvement. 4th ed. Upper Saddle River, N.J: Prentice Hall, 2001.

MLA-referens (9:e uppl.)

Smith, Gerald. Statistical Process Control and Quality Improvement. 4th ed. Prentice Hall, 2001.