Mutter, J. D. (1981). Categorization strategies and their relationship to science achievement of students at Universiti Kebangsaan Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mutter, Jay Dominic. Categorization Strategies and Their Relationship to Science Achievement of Students at Universiti Kebangsaan Malaysia. 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Mutter, Jay Dominic. Categorization Strategies and Their Relationship to Science Achievement of Students at Universiti Kebangsaan Malaysia. 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.