Ramage, J. (1983). Energy, a guidebook. Oxford University Press.
Dyfyniad Arddull ChicagoRamage, Janet. Energy, a Guidebook. Oxford [Oxfordshire] ; New York: Oxford University Press, 1983.
Dyfyniad MLARamage, Janet. Energy, a Guidebook. Oxford University Press, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.