(1970). Normal aging: Reports form the Duke Longitudinal Study, 1955-1969. Duke Unversity Press.
Chicago-čujuhus (17. p.)Normal Aging: Reports Form the Duke Longitudinal Study, 1955-1969. Durham: Duke Unversity Press, 1970.
MLA-čujuhus (9. p.)Normal Aging: Reports Form the Duke Longitudinal Study, 1955-1969. Duke Unversity Press, 1970.
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