Hanley, N., & Barbier, E. (2009). Pricing nature: Cost- benifit analyisis and Environmental policy. Edward Elgar.
استشهاد بنمط شيكاغوHanley, Nick, و Edward Barbier. Pricing Nature: Cost- Benifit Analyisis and Environmental Policy. Cheltenham, UK ; Northampton, MA: Edward Elgar, 2009.
MLA استشهادHanley, Nick, و Edward Barbier. Pricing Nature: Cost- Benifit Analyisis and Environmental Policy. Edward Elgar, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.