Mance, G. (1987). Pollution threat of heavy metals in aquatic environments. Elsevier.
Dyfyniad Arddull ChicagoMance, Geoffrey. Pollution Threat of Heavy Metals in Aquatic Environments. London: Elsevier, 1987.
Dyfyniad MLAMance, Geoffrey. Pollution Threat of Heavy Metals in Aquatic Environments. Elsevier, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.