Neal, H. E. (1960). Engineers unlimited: Your career in engineering. New York: Julian Messner.
Dyfyniad Arddull ChicagoNeal, Harry Edward. Engineers Unlimited: Your Career in Engineering. New York: Julian Messner, 1960.
Dyfyniad MLANeal, Harry Edward. Engineers Unlimited: Your Career in Engineering. New York: Julian Messner, 1960.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.