Freeman, A. M. (2003). Measurement of environmental and resource values: Theory and methods. Resources for the Future.
Citação norma ChicagoFreeman, A. Myrick. Measurement of Environmental and Resource Values: Theory and Methods. Washington, DC: Resources for the Future, 2003.
Citação norma MLAFreeman, A. Myrick. Measurement of Environmental and Resource Values: Theory and Methods. Resources for the Future, 2003.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.