Schuller, R. H. (1979). Discover your possibilities. Hour of Power.
Dyfyniad Arddull ChicagoSchuller, Robert Harold. Discover Your Possibilities. Garden Grove, California: Hour of Power, 1979.
Dyfyniad MLASchuller, Robert Harold. Discover Your Possibilities. Hour of Power, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.