(1989). World book encyclopedia of science: Men and women of science. World Book,Inc..
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Dyfyniad Arddull Chicago
World Book Encyclopedia of Science: Men and Women of Science. Chicago: World Book,Inc., 1989.
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Dyfyniad MLA
World Book Encyclopedia of Science: Men and Women of Science. World Book,Inc., 1989.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.