APA
Halvorsen R., Layton D. F., . (2006). Explorations in environmental and natural resource economics. Cheltenham: Edward Elgar.
Chicago
Halvorsen Robert, Layton David F, . 2006. Explorations in environmental and natural resource economics. Cheltenham: Edward Elgar.
Harvard
Halvorsen R., Layton D. F., . (2006). Explorations in environmental and natural resource economics. Cheltenham: Edward Elgar.
MLA
Halvorsen Robert, Layton David F, . Explorations in environmental and natural resource economics. Cheltenham: Edward Elgar. 2006.