APA

United States, . (1988). Government consultants: agencies' consulting services contract obligations for fiscal year 1987. [Washington, D.C: .

Chicago

United States, . 1988. Government consultants: agencies' consulting services contract obligations for fiscal year 1987. [Washington, D.C: .

Harvard

United States, . (1988). Government consultants: agencies' consulting services contract obligations for fiscal year 1987. [Washington, D.C: .

MLA

United States, . Government consultants: agencies' consulting services contract obligations for fiscal year 1987. [Washington, D.C: . 1988.