Schwartz, A. N., & Peterson, J. A. (1979). Introduction to gerontology. Holt, Rinehart, and Winston.
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Dyfyniad Arddull Chicago
Schwartz, Arthur N., and James Alfred Peterson. Introduction to Gerontology. New York: Holt, Rinehart, and Winston, 1979.
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Dyfyniad MLA
Schwartz, Arthur N., and James Alfred Peterson. Introduction to Gerontology. Holt, Rinehart, and Winston, 1979.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.