Gelfand, D. E. (1982). Aging: The ethnic factor. Little, Brown.
Chicago-čujuhus (17. p.)Gelfand, Donald E. Aging: The Ethnic Factor. Little, Brown, 1982.
MLA-čujuhus (9. p.)Gelfand, Donald E. Aging: The Ethnic Factor. Little, Brown, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.