Não informado. (2003). Studies in foreign language teaching. Dokkyo University, Research Institute of Foreign Language Teaching.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Studies in Foreign Language Teaching. Soka-Shi, Japão: Dokkyo University, Research Institute of Foreign Language Teaching, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Studies in Foreign Language Teaching. Dokkyo University, Research Institute of Foreign Language Teaching, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.
