(1970). The new popular encyclopedia of the sciences. New York: Grosset and Dunlap.
Dyfyniad Arddull ChicagoThe New Popular Encyclopedia of the Sciences. New York: Grosset and Dunlap, 1970.
Dyfyniad MLAThe New Popular Encyclopedia of the Sciences. New York: Grosset and Dunlap, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.