Erber, J. T. (2005). Aging and older adulthood (ed.). Thomson.
Chicago-čujuhus (17. p.)Erber, Joan T. Aging and Older Adulthood. ed. Belmont, California: Thomson, 2005.
MLA-čujuhus (9. p.)Erber, Joan T. Aging and Older Adulthood. ed. Thomson, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.