APA Citation

Clark, W. C., & Clark, W. C. (1989). La gestion del planeta Tierra.

Chicago Style Citation

Clark, William C., and William C. Clark. La Gestion Del Planeta Tierra. 1989.

MLA Citation

Clark, William C., and William C. Clark. La Gestion Del Planeta Tierra. 1989.

Warning: These citations may not always be 100% accurate.