APA (7th ed.) Citation

United States. Environmental Protection Agency. Region V. (1998). The happy Earth Day activities book. U.S. Environmental Protection Agency, Region 5.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Region V. The Happy Earth Day Activities Book. [Washington, D.C.]: U.S. Environmental Protection Agency, Region 5, 1998.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Region V. The Happy Earth Day Activities Book. U.S. Environmental Protection Agency, Region 5, 1998.