Cartledge, B. (1992). Monitoring the environment. Oxford University Press.
Dyfyniad Arddull ChicagoCartledge, Bryan. Monitoring the Environment. Oxford ; New York: Oxford University Press, 1992.
Dyfyniad MLACartledge, Bryan. Monitoring the Environment. Oxford University Press, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.