Cofnodi Dyfyniadau
Dyfyniad APA
Umland, J. B. (1993). General chemistry. West.
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Dyfyniad Arddull Chicago
Umland, Jean B. General Chemistry. Minneapolis/St. Paul: West, 1993.
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Dyfyniad MLA
Umland, Jean B. General Chemistry. West, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.