National Academies Press (U.S.) & ebrary, Inc. (2006). Learning to think spatially. National Academies Press.
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Dyfyniad Arddull Chicago
National Academies Press (U.S.) and Inc ebrary. Learning to Think Spatially. Washington, D.C.: National Academies Press, 2006.
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Dyfyniad MLA
National Academies Press (U.S.) and Inc ebrary. Learning to Think Spatially. National Academies Press, 2006.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.