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Dyfyniad Arddull ChicagoStello Jordan. Handbook of Technical Writing Practices. Vol.2. New York: Wiley Interscience, 1971.
Dyfyniad MLAStello Jordan. Handbook of Technical Writing Practices. Vol.2. New York: Wiley Interscience, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.