Tan, B. K. (1977). Proficiency in English as a second language amongst secondary four students in Chinese schools and Chinese-English integrated schools in the context of bilingual education in Singapore.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tan, Beng Kim. Proficiency in English as a Second Language Amongst Secondary Four Students in Chinese Schools and Chinese-English Integrated Schools in the Context of Bilingual Education in Singapore. 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tan, Beng Kim. Proficiency in English as a Second Language Amongst Secondary Four Students in Chinese Schools and Chinese-English Integrated Schools in the Context of Bilingual Education in Singapore. 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.