McKenzie, S. C. (1980). Aging and old age. Scott, Foresman.
Cita Chicago (17th ed.)McKenzie, Sheila C. Aging and Old Age. Glenview, Ill.: Scott, Foresman, 1980.
Cita MLA (8th ed.)McKenzie, Sheila C. Aging and Old Age. Scott, Foresman, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.