Ebel, R. L. (1979). Essentials of educational measurement (3rd ed.). Prentice- Hall.
Cita Chicago (17th ed.)Ebel, Robert L. Essentials of Educational Measurement. 3rd ed. Englewood Cliffs: Prentice- Hall, 1979.
Cita MLA (9th ed.)Ebel, Robert L. Essentials of Educational Measurement. 3rd ed. Prentice- Hall, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.