Cita APA (7th ed.)
Barde, J. -. P., & Pearce, D. W. (1991). Valuing the Environment: Six case studies. Earthscan Publications.
Cita Chicago (17th ed.)
Barde, Jean - Philippe, i David W. Pearce. Valuing the Environment: Six Case Studies. London: Earthscan Publications, 1991.
Cita MLA (9th ed.)
Barde, Jean - Philippe, i David W. Pearce. Valuing the Environment: Six Case Studies. Earthscan Publications, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.