APA (7th ed.) Citation

Library of Congress. Congressional Research Service & ProQuest (Firm). (1986). Directory of Environmental Organizations and Contacts in the Washington, D.C., Metropolitan Area. [publisher not identified].

Chicago Style (17th ed.) Citation

Library of Congress. Congressional Research Service and ProQuest (Firm). Directory of Environmental Organizations and Contacts in the Washington, D.C., Metropolitan Area. [Place of publication not identified]: [publisher not identified], 1986.

MLA (9th ed.) Citation

Library of Congress. Congressional Research Service and ProQuest (Firm). Directory of Environmental Organizations and Contacts in the Washington, D.C., Metropolitan Area. [publisher not identified], 1986.