Παραπομπή σε μορφή APA (7η εκδ.)

Freeman, A. M. (2003). The measurement of environmental and resource values: Theory and methods (2nd ed.). Resources for the Future.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. 2nd ed. Washington, DC: Resources for the Future, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. 2nd ed. Resources for the Future, 2003.