Cofnodi Dyfyniadau
Dyfyniad APA
(1977). The Reader's adviser (12th.ed.). R.R.Bowker.
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Dyfyniad Arddull Chicago
The Reader's Adviser. 12th.ed. New York: R.R.Bowker, 1977.
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Dyfyniad MLA
The Reader's Adviser. 12th.ed. R.R.Bowker, 1977.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.