Freris, L. L. (2008). Renewable energy in power systems. Chichester, U.K: John Wiley & Sons.
Dyfyniad Arddull ChicagoFreris, L. L. Renewable Energy in Power Systems. Chichester, U.K: John Wiley & Sons, 2008.
Dyfyniad MLAFreris, L. L. Renewable Energy in Power Systems. Chichester, U.K: John Wiley & Sons, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.