Dyfyniad APA
ebrary, Inc, Batabyal, A. A., & Nijkamp, P. (2011). Research tools in natural resource and environmental economics. World Scientific.
Dyfyniad Arddull Chicago
ebrary, Inc, Amitrajeet A. Batabyal, and Peter Nijkamp. Research Tools in Natural Resource and Environmental Economics. Hackensack, N.J.: World Scientific, 2011.
Dyfyniad MLA
ebrary, Inc, et al. Research Tools in Natural Resource and Environmental Economics. World Scientific, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.