Prochnow, D., & Prochnow, K. (1993). Why: Experiments for the young scientist. TAB Books.
Dyfyniad Arddull ChicagoProchnow, Dave, and Kathy Prochnow. Why: Experiments for the Young Scientist. Blue Ridge Summit, PA: TAB Books, 1993.
Dyfyniad MLAProchnow, Dave, and Kathy Prochnow. Why: Experiments for the Young Scientist. TAB Books, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.