Educational Testing Service. (1963). Multiple-Choice questions: A close look. Educational Testing Service.
Cita Chicago (17th ed.)Educational Testing Service. Multiple-Choice Questions: A Close Look. Princeton: Educational Testing Service, 1963.
Cita MLA (9th ed.)Educational Testing Service. Multiple-Choice Questions: A Close Look. Educational Testing Service, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.