Citazione Stile APA (7a Edizione)

Freeman, A. M. (1993). Measurement of environmental and resource values. Resources for the Future.

Citazione stile Chigago Style (17a edizione)

Freeman, A. Myrick. Measurement of Environmental and Resource Values. Washington: Resources for the Future, 1993.

Citatione MLA (9a ed.)

Freeman, A. Myrick. Measurement of Environmental and Resource Values. Resources for the Future, 1993.