Hancock, B. L. (1987). Social work with older people. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHancock, Betsy Ledbetter. Social Work with Older People. Englewood Cliffs: Prentice-Hall, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHancock, Betsy Ledbetter. Social Work with Older People. Prentice-Hall, 1987.
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