Johansson, P. O. (1994). The economic theory and measurement of enviornmental benefits. Cambridge University Press.
استشهاد بنمط شيكاغوJohansson, Per- Olov. The Economic Theory and Measurement of Enviornmental Benefits. Cambridge: Cambridge University Press, 1994.
MLA استشهادJohansson, Per- Olov. The Economic Theory and Measurement of Enviornmental Benefits. Cambridge University Press, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.