APA (7th ed.) Citation

United States. Environmental Protection Agency. Office of Research and Development & United States. Environmental Protection Agency. Office of Research and Development. (1991). Always a river: Supplemental environmental education curriculum on the Ohio River and water grades K-12. The Agency.

Chicago Style (17th ed.) Citation

United States. Environmental Protection Agency. Office of Research and Development and United States. Environmental Protection Agency. Office of Research and Development. Always a River: Supplemental Environmental Education Curriculum on the Ohio River and Water Grades K-12. Cincinnati, Ohio: The Agency, 1991.

MLA (9th ed.) Citation

United States. Environmental Protection Agency. Office of Research and Development and United States. Environmental Protection Agency. Office of Research and Development. Always a River: Supplemental Environmental Education Curriculum on the Ohio River and Water Grades K-12. The Agency, 1991.