Nierenberg, G. (1982). The art of creative thinking. Simon & Schuster.
Dyfyniad Arddull ChicagoNierenberg, Gwrard. The Art of Creative Thinking. New York: Simon & Schuster, 1982.
Dyfyniad MLANierenberg, Gwrard. The Art of Creative Thinking. Simon & Schuster, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.