APA

United States, . (1968). Report to Congress: opportunity for savings in procurement costs by improved procurement policies and procedures, National Aeronautics and Space Administration. [Washington, D.C: .

Chicago

United States, . 1968. Report to Congress: opportunity for savings in procurement costs by improved procurement policies and procedures, National Aeronautics and Space Administration. [Washington, D.C: .

Harvard

United States, . (1968). Report to Congress: opportunity for savings in procurement costs by improved procurement policies and procedures, National Aeronautics and Space Administration. [Washington, D.C: .

MLA

United States, . Report to Congress: opportunity for savings in procurement costs by improved procurement policies and procedures, National Aeronautics and Space Administration. [Washington, D.C: . 1968.