Cita APA

Beigie, C. E., & Hero, A. O. (1980). Natural resources U. S. -Canadian relations. Westview.

Citación estilo Chicago

Beigie, Carl E., and Alfred O. Hero. Natural Resources U. S. -Canadian Relations. Boulder, Colo: Westview, 1980.

Cita MLA

Beigie, Carl E., and Alfred O. Hero. Natural Resources U. S. -Canadian Relations. Westview, 1980.