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Dyfyniad Arddull ChicagoIndymedia.be. "6/21: Voluntary Rolling Blackout, Protest Bush Policies." Indymedia.be (2001/06/20) .
Dyfyniad MLAIndymedia.be. "6/21: Voluntary Rolling Blackout, Protest Bush Policies." Indymedia.be (2001/06/20), .
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.