Wong, H. L. (1979). A survey on the academic achievement and problems of hearing-impaired pupils in secondary schools in Singapore.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wong, Hon Loong. A Survey on the Academic Achievement and Problems of Hearing-impaired Pupils in Secondary Schools in Singapore. 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wong, Hon Loong. A Survey on the Academic Achievement and Problems of Hearing-impaired Pupils in Secondary Schools in Singapore. 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.