David, T. L. (2008). Effectiveness of communicative language teaching in developing speaking proficiency in english as a second language among unitars students.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)David, Tiongun Lumbok@. Effectiveness of Communicative Language Teaching in Developing Speaking Proficiency in English as a Second Language Among Unitars Students. 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)David, Tiongun Lumbok@. Effectiveness of Communicative Language Teaching in Developing Speaking Proficiency in English as a Second Language Among Unitars Students. 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.