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Dyfyniad Arddull ChicagoLiker, Jeffrey K., and David Meier. The Toyota Way Fieldbook: A Practical Guide for Implementing Toyota's 4ps. New Delhi: Tata McGraw-Hill, 2006.
Dyfyniad MLALiker, Jeffrey K., and David Meier. The Toyota Way Fieldbook: A Practical Guide for Implementing Toyota's 4ps. Tata McGraw-Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.