Your world, my world :
a book for young environmentalists.

APA Citation

United States. Environmental Protection Agency. (1973). Your world, my world: a book for young environmentalists. Washington: U.S. Environmental Protection Agency : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

United States. Environmental Protection Agency. Your World, My World: a Book for Young Environmentalists. Washington: U.S. Environmental Protection Agency : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1973.

Warning: These citations may not always be complete (especially for serials).