United States. General Accounting Office. (1975). Evaluating governmental performance: Changes and challenges for GAO : a series of lectures delivered at the United States General Accounting Office, 1973-1975. Government Printing Office.
Lua i Stíl Chicago (17ú heag.)United States. General Accounting Office. Evaluating Governmental Performance: Changes and Challenges for GAO : A Series of Lectures Delivered at the United States General Accounting Office, 1973-1975. Washington, D.C: Government Printing Office, 1975.
Lua MLA (9ú heag.)United States. General Accounting Office. Evaluating Governmental Performance: Changes and Challenges for GAO : A Series of Lectures Delivered at the United States General Accounting Office, 1973-1975. Government Printing Office, 1975.