Bernstein Leonard. (2004). Chemical changes: Concepts and challenges. Pearson Education..
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Dyfyniad Arddull Chicago
Bernstein Leonard. Chemical Changes: Concepts and Challenges. America: Pearson Education., 2004.
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Dyfyniad MLA
Bernstein Leonard. Chemical Changes: Concepts and Challenges. Pearson Education., 2004.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.