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Dyfyniad Arddull ChicagoÇengel, Yunus A. Dr. Thermodynamics: An Engineering Approach. 3rd ed. Boston: McGraw-Hill, 1998.
Dyfyniad MLAÇengel, Yunus A. Dr. Thermodynamics: An Engineering Approach. 3rd ed. Boston: McGraw-Hill, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.