Afrin, S., & Akhter, M. (2013). A study on the listening and speaking skills in English at HSC level: Challenges and possible solutions. BRAC University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Afrin, Sadia, و Mahmuda Akhter. A Study on the Listening and Speaking Skills in English at HSC Level: Challenges and Possible Solutions. BRAC University, 2013.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Afrin, Sadia, و Mahmuda Akhter. A Study on the Listening and Speaking Skills in English at HSC Level: Challenges and Possible Solutions. BRAC University, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.