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Dyfyniad Arddull ChicagoWolff, Jurgen. Creativity Now: Get Inspired, Create Ideas and Make Them Happen! 2. Pearson Education UK.
Dyfyniad MLAWolff, Jurgen. Creativity Now: Get Inspired, Create Ideas and Make Them Happen! 2. Pearson Education UK.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.