ebrary, Inc, Edmondson, R., & Kondratowitz, H. v. (2009). Valuing older people: A humanist approach to ageing. Policy Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, Ricca Edmondson, और Hans-Joachim von Kondratowitz. Valuing Older People: A Humanist Approach to Ageing. Bristol: Policy Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, et al. Valuing Older People: A Humanist Approach to Ageing. Policy Press, 2009.
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