Zeitz, P. (2007). The art and craft of problem solving (2nd ed.). John Wiley.
Dyfyniad Arddull ChicagoZeitz, Paul. The Art and Craft of Problem Solving. 2nd ed. Hoboken, NJ: John Wiley, 2007.
Dyfyniad MLAZeitz, Paul. The Art and Craft of Problem Solving. 2nd ed. John Wiley, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.