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Dyfyniad Arddull ChicagoSells, Saul B. The Definition and Measurement of Mental Health. Washington: U.S. National Center for Health Statistics, 1968.
Dyfyniad MLASells, Saul B. The Definition and Measurement of Mental Health. U.S. National Center for Health Statistics, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.