Hughes, S. (1990). Understanding guidance. Waverly Abbey House.
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Dyfyniad Arddull Chicago
Hughes, Selwyn. Understanding Guidance. Farnham: Waverly Abbey House, 1990.
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Dyfyniad MLA
Hughes, Selwyn. Understanding Guidance. Waverly Abbey House, 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.