John, D. (1996). Dictionary of Chemistry. Oxford University.
Dyfyniad Arddull ChicagoJohn, Daintith. Dictionary of Chemistry. Oxford: Oxford University, 1996.
Dyfyniad MLAJohn, Daintith. Dictionary of Chemistry. Oxford University, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.