Ebel, R. L., & Ebel, R. L. (1972). Essentials of educational measurement ([Second edition].). Prentice-Hall.
Cita Chicago (17th ed.)Ebel, Roberts L., i Robert L. Ebel. Essentials of Educational Measurement. [Second edition]. Englewood Cliffs: Prentice-Hall, 1972.
Cita MLA (9th ed.)Ebel, Roberts L., i Robert L. Ebel. Essentials of Educational Measurement. [Second edition]. Prentice-Hall, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.