Salvia, J. (1991). Assessment (5th.ed.). Houghton Mifflin.
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Dyfyniad Arddull Chicago
Salvia, John. Assessment. 5th.ed. Dallas: Houghton Mifflin, 1991.
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Dyfyniad MLA
Salvia, John. Assessment. 5th.ed. Houghton Mifflin, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.