Blackwood, O. H. 1., Bell, R. M., & Kelly, W. C. (1963). General physics (3rd ed.). New York: Wiley.
Dyfyniad Arddull ChicagoBlackwood, Oswald H. 1888-1953, Raymond Martin Bell, và William Clark Kelly. General Physics. 3rd ed. New York: Wiley, 1963.
Dyfyniad MLABlackwood, Oswald H. 1888-1953, Raymond Martin Bell, và William Clark Kelly. General Physics. 3rd ed. New York: Wiley, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.