Gamon, D. Building mental muscle: Conditioning exercises for the six intelligence zones. Viva Books.
Dyfyniad Arddull ChicagoGamon, David; Bragdon. Building Mental Muscle: Conditioning Exercises for the Six Intelligence Zones. Viva Books.
Dyfyniad MLAGamon, David; Bragdon. Building Mental Muscle: Conditioning Exercises for the Six Intelligence Zones. Viva Books.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.