Kwa maelezo zaidi, tazama William G. Gale na John Sibelhaus, Perspectives on the Household Saving Rate, Brookings Papers on Economic Activity (1: 1999), pp. 181-224.
Kwa mfano, katika kitabu cha Gale na Sabelhaus, Perspectives on the Household Saving Rate, mwaka wa 1999:
Hakuna fasihi iliyotumiwa katika kisa hiki.