Chang, R. Y., & Kelly, P. K. (1994). Improving through benchmarking: A practical guide to achieving peak process performance. Richard Chang Associates, Inc.
Chicago-viite (17. p.)Chang, Richard Y., ja P. Keith Kelly. Improving Through Benchmarking: A Practical Guide to Achieving Peak Process Performance. Irvine, California: Richard Chang Associates, Inc, 1994.
MLA-viite (9. p.)Chang, Richard Y., ja P. Keith Kelly. Improving Through Benchmarking: A Practical Guide to Achieving Peak Process Performance. Richard Chang Associates, Inc, 1994.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.