APA (7th ed.) Citation

Clark, R. L., & Spengler, J. J. (1980). The economics of individual and population aging. Cambridge University Press.

Chicago Style (17th ed.) Citation

Clark, Robert L., and Joseph John Spengler. The Economics of Individual and Population Aging. Cambridge: Cambridge University Press, 1980.

MLA (9th ed.) Citation

Clark, Robert L., and Joseph John Spengler. The Economics of Individual and Population Aging. Cambridge University Press, 1980.