Gelfand, D. E. (1982). Aging: The ethnic factor. Little, Brown.
Cita Chicago (17th ed.)Gelfand, Donald E. Aging: The Ethnic Factor. Little, Brown, 1982.
Cita MLA (9th ed.)Gelfand, Donald E. Aging: The Ethnic Factor. Little, Brown, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.