Enrick, N. L. 1. -., & Enrick, N. L. 1. -. (1972). Quality control and reliability: Practice-tested methods and procedures, based on scientific principles and simplified for immediate application in a variety of manufacturing plants (6. edition --.). New York, New York: Industrial Press.

Enrick, Norbert Lloyd 1920 -, and Norbert Lloyd 1920 - Enrick. Quality Control and Reliability: Practice-tested Methods and Procedures, Based On Scientific Principles and Simplified for Immediate Application in a Variety of Manufacturing Plants. 6. edition --. New York, New York: Industrial Press, 1972.

Enrick, Norbert Lloyd 1920 -, and Norbert Lloyd 1920 - Enrick. Quality Control and Reliability: Practice-tested Methods and Procedures, Based On Scientific Principles and Simplified for Immediate Application in a Variety of Manufacturing Plants. 6. edition --. New York, New York: Industrial Press, 1972.