Lewis, G. E. D. (1949). A comparative study of the intelligence and educability of Malays and Chinese in Malaya and its significance and relations to the educational policy with special reference to the political future of the Malays.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lewis, G. E. D. A Comparative Study of the Intelligence and Educability of Malays and Chinese in Malaya and Its Significance and Relations to the Educational Policy with Special Reference to the Political Future of the Malays. 1949.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lewis, G. E. D. A Comparative Study of the Intelligence and Educability of Malays and Chinese in Malaya and Its Significance and Relations to the Educational Policy with Special Reference to the Political Future of the Malays. 1949.
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