APA

(1992). Global environment: "what should the United States do to improve the global environment?". Washington: Govt. Print. Off.

Chicago

1992. Global environment: "what should the United States do to improve the global environment?". Washington: Govt. Print. Off.

Harvard

(1992). Global environment: "what should the United States do to improve the global environment?". Washington: Govt. Print. Off.

MLA

Global environment: "what should the United States do to improve the global environment?". Washington: Govt. Print. Off. 1992.