Cita APA (7a ed.)

Levinson, W. A., & Tumbelty, F. (1997). SPC essentials and productivity improvement: A manufacturing approach. ASQC Quality Press.

Cita Chicago Style (17a ed.)

Levinson, William A., y Frank Tumbelty. SPC Essentials and Productivity Improvement: A Manufacturing Approach. Milwaukee, Wis.: ASQC Quality Press, 1997.

Cita MLA (9a ed.)

Levinson, William A., y Frank Tumbelty. SPC Essentials and Productivity Improvement: A Manufacturing Approach. ASQC Quality Press, 1997.