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Dyfyniad Arddull ChicagoGopalakrishnan P. Materials Management: An Integrated Approach. New Delhi: Prentice Hall, 1977.
Dyfyniad MLAGopalakrishnan P. Materials Management: An Integrated Approach. Prentice Hall, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.