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Dyfyniad Arddull ChicagoPan, Isabel L. "Oil Import Bill Surges 22% to $3B in 1997." Manila Times 1998.
Dyfyniad MLAPan, Isabel L. "Oil Import Bill Surges 22% to $3B in 1997." Manila Times, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.