Παραπομπή σε μορφή APA (7η εκδ.)

Freeman, A. M. (1994). The measurement of environmental and resource values: Theory and methods. Resources for the Future.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. Washington: Resources for the Future, 1994.

Παραπομπή σε μορφή MLA (9th εκδ.)

Freeman, A. Myrick. The Measurement of Environmental and Resource Values: Theory and Methods. Resources for the Future, 1994.