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APA-referensUnited States. Executive Office of the President. Office of Management and Budget. (1976). Problems in evaluation design: A background paper. Executive Office of the President, U.S., Office of Management and Budget.
Chicago-stil citatUnited States. Executive Office of the President. Office of Management and Budget. Problems in Evaluation Design: A Background Paper. Washington: Executive Office of the President, U.S., Office of Management and Budget, 1976.
MLA-referensUnited States. Executive Office of the President. Office of Management and Budget. Problems in Evaluation Design: A Background Paper. Executive Office of the President, U.S., Office of Management and Budget, 1976.
Harvard-stil citatUnited States. Executive Office of the President. Office of Management and Budget. 1976. Problems in evaluation design: A background paper. Washington: Executive Office of the President, U.S., Office of Management and Budget.