Quake, E. B. N. (1999). A pilot programme for language skills extension through written group projects for Singapore lower secondary students.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Quake, Esther Bee Neo. A Pilot Programme for Language Skills Extension Through Written Group Projects for Singapore Lower Secondary Students. 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Quake, Esther Bee Neo. A Pilot Programme for Language Skills Extension Through Written Group Projects for Singapore Lower Secondary Students. 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.