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Dyfyniad Arddull ChicagoSingh, Raghuvir. Creativity and Innovation. 1st. Savera Publishing House, New Delhi, 2012.
Dyfyniad MLASingh, Raghuvir. Creativity and Innovation. 1st. Savera Publishing House, New Delhi, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.