Hill, J. W. (1992). Chemistry for changing times (6th ed.). Macmillan.
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Dyfyniad Arddull Chicago
Hill, John W. Chemistry for Changing Times. 6th ed. New York: Macmillan, 1992.
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Dyfyniad MLA
Hill, John W. Chemistry for Changing Times. 6th ed. Macmillan, 1992.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.