" ‏(1988)* Pampel, Fred C. and H. Elizabeth Peters, "The Easterlin Effect," "Annual Review of Sociology" (1995) v21 pp 163–194]* Population Reference Bureau, "Population Handbook" (5th ed.
" (1988)* Pampel, Fred C. and H. Elizabeth Peters, "The Easterlin Effect," "Annual Review of Sociology" (1995) v21 pp 163–194]* Population Reference Bureau, "Population Handbook" (5th ed.