Johansson, P. O. (1993). Cost benefit analysis of environmental change. Cambridge University Press.
Chicago Style aipamenaJohansson, Per Olov. Cost Benefit Analysis of Environmental Change. Cambridge: Cambridge University Press, 1993.
MLA aipamenaJohansson, Per Olov. Cost Benefit Analysis of Environmental Change. Cambridge University Press, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.