Johansson, P. O. (1994). The economic theory and measurement of enviornmental benefits. Cambridge University Press.
Chicago Style aipamenaJohansson, Per- Olov. The Economic Theory and Measurement of Enviornmental Benefits. Cambridge: Cambridge University Press, 1994.
MLA aipamenaJohansson, Per- Olov. The Economic Theory and Measurement of Enviornmental Benefits. Cambridge University Press, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.