Dyfyniad APA

Campbell, J. Y. (1999). Investing retirement wealth: A life-cycle model. National Bureau of Economic Research.

Dyfyniad Arddull Chicago

Campbell, John Y. Investing Retirement Wealth: A Life-cycle Model. Cambridge: National Bureau of Economic Research, 1999.

Dyfyniad MLA

Campbell, John Y. Investing Retirement Wealth: A Life-cycle Model. National Bureau of Economic Research, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.