National Research Council (U.S.). Committee on the General Aptitude Test Battery, Hartigan, J. A., & Wigdor, A. K. (1989). Fairness in employment testing: Validity generalization, minority issues, and the General Aptitude Test Battery. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Committee on the General Aptitude Test Battery, John A. Hartigan, و Alexandra K. Wigdor. Fairness in Employment Testing: Validity Generalization, Minority Issues, and the General Aptitude Test Battery. Washington, D.C.: National Academy Press, 1989.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Committee on the General Aptitude Test Battery, et al. Fairness in Employment Testing: Validity Generalization, Minority Issues, and the General Aptitude Test Battery. National Academy Press, 1989.