Freeman, A. M. (1994). The measurement of environmental and resource values: Theory and methods (2. paperback printing.). Resources for the Future.
Chicago-Zitierstil (17. Ausg.)Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. 2. paperback printing. Washington, DC: Resources for the Future, 1994.
MLA-Zitierstil (9. Ausg.)Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. 2. paperback printing. Resources for the Future, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.