Cropper, M. L., & Subramanian, U. (1995). Public choices between lifesaving programs: How important are lives saved? World Bank.
Chicago Style aipamenaCropper, Maureen L., and Uma Subramanian. Public Choices Between Lifesaving Programs: How Important Are Lives Saved? Washington, D.C: World Bank, 1995.
MLA aipamenaCropper, Maureen L., and Uma Subramanian. Public Choices Between Lifesaving Programs: How Important Are Lives Saved? World Bank, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.