Hawley, G. G., & Lewis, R. J. (1998). Hawley's condensed chemical dictionary (13th ed.). Galotia publication.
Dyfyniad Arddull ChicagoHawley, Gessner G., and Richard J. Lewis. Hawley's Condensed Chemical Dictionary. 13th ed. New Delhi: Galotia publication, 1998.
Dyfyniad MLAHawley, Gessner G., and Richard J. Lewis. Hawley's Condensed Chemical Dictionary. 13th ed. Galotia publication, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.