(1964). The book of popular science. New York: Grolier Incorporated.
Dyfyniad Arddull ChicagoThe Book of Popular Science. New York: Grolier Incorporated, 1964.
Dyfyniad MLAThe Book of Popular Science. New York: Grolier Incorporated, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.