Berk, R. A. (1981). Educational evaluation methodology: The state of the art. Johns Hopkins University Press.
Cita Chicago (17th ed.)Berk, Ronald A. Educational Evaluation Methodology: The State of the Art. Baltimore, Md: Johns Hopkins University Press, 1981.
Cita MLA (9th ed.)Berk, Ronald A. Educational Evaluation Methodology: The State of the Art. Johns Hopkins University Press, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.