Gaya APA

Cleaning up : U.S. waste management technology and third world development / John Elkington, Jonatahan Shopley. (1989). : United State : World Resources Institutes.

Gaya MLA

Cleaning up : U.S. waste management technology and third world development / John Elkington, Jonatahan Shopley. . : United State : World Resources Institutes, 1989. Text.