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Dyfyniad Arddull ChicagoStevenson. Elements of Power System Analysis. 2nd ed. Tokyo: McGraw-Hill, 1962.
Dyfyniad MLAStevenson. Elements of Power System Analysis. 2nd ed. McGraw-Hill, 1962.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.