APA

United States, . (1979). Energy-saving strategies for federal procurement. [Washington, D.C: .

Chicago

United States, . 1979. Energy-saving strategies for federal procurement. [Washington, D.C: .

Harvard

United States, . (1979). Energy-saving strategies for federal procurement. [Washington, D.C: .

MLA

United States, . Energy-saving strategies for federal procurement. [Washington, D.C: . 1979.