Wazir Karim. (1970). A study of under and over achievers in a malay medium secondary school in Singapore. Department of Economics and Economic Research Centre.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wazir Karim. A Study of Under and over Achievers in a Malay Medium Secondary School in Singapore. University of Singapore, Singapore: Department of Economics and Economic Research Centre, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wazir Karim. A Study of Under and over Achievers in a Malay Medium Secondary School in Singapore. Department of Economics and Economic Research Centre, 1970.
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