Khatena, J. (1964). A study of comparative performance on the Raven's coloured progressive matrices and the Goodenough draw-a-man test in two Singapore primary schools.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Khatena, Joe. A Study of Comparative Performance on the Raven's Coloured Progressive Matrices and the Goodenough Draw-a-man Test in Two Singapore Primary Schools. 1964.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Khatena, Joe. A Study of Comparative Performance on the Raven's Coloured Progressive Matrices and the Goodenough Draw-a-man Test in Two Singapore Primary Schools. 1964.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.