APA (7th ed.) Citation

United States. National Technical Information Service & United States. Environmental Protection Agency. (1977). Environmental microthesaurus: A hierarchical list of indexing terms used by NTIS. The Branch.

Chicago Style (17th ed.) Citation

United States. National Technical Information Service and United States. Environmental Protection Agency. Environmental Microthesaurus: A Hierarchical List of Indexing Terms Used by NTIS. Springfield, Va: The Branch, 1977.

MLA (9th ed.) Citation

United States. National Technical Information Service and United States. Environmental Protection Agency. Environmental Microthesaurus: A Hierarchical List of Indexing Terms Used by NTIS. The Branch, 1977.