Schulz, J. H. (1988). The economics of aging. Auburn House.
Cita Chicago (17th ed.)Schulz, James H. The Economics of Aging. Dover, Mass: Auburn House, 1988.
Cita MLA (9th ed.)Schulz, James H. The Economics of Aging. Auburn House, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.