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Dyfyniad Arddull ChicagoGrayson, Lawrence P. The Design of Engineering Curricula. Paris: Unesco, 1977.
Dyfyniad MLAGrayson, Lawrence P. The Design of Engineering Curricula. Unesco, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.