Crandall, R. C. (1980). Gerontology: A behavioral science approach. Addison-Wesley Pub. Co..
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Dyfyniad Arddull Chicago
Crandall, Richard C. Gerontology: A Behavioral Science Approach. Reading, Mass.: Addison-Wesley Pub. Co., 1980.
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Dyfyniad MLA
Crandall, Richard C. Gerontology: A Behavioral Science Approach. Addison-Wesley Pub. Co., 1980.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.