APA

United States, . (1991). Budget totals: program and authorization information. [Washington, D.C: .

Chicago

United States, . 1991. Budget totals: program and authorization information. [Washington, D.C: .

Harvard

United States, . (1991). Budget totals: program and authorization information. [Washington, D.C: .

MLA

United States, . Budget totals: program and authorization information. [Washington, D.C: . 1991.