Lenk, J. D. (1994). McGraw-Hill electronic testing handbook: Procedures and techniques. McGraw Hill.
Cita Chicago (17th ed.)Lenk, John D. McGraw-Hill Electronic Testing Handbook: Procedures and Techniques. Nueva York: McGraw Hill, 1994.
Cita MLA (9th ed.)Lenk, John D. McGraw-Hill Electronic Testing Handbook: Procedures and Techniques. McGraw Hill, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.