Betsis, A. (2014). Succeed in ielts speaking and vocabulary: Ideal for both the academic and the general training modules. Thành phố Hồ Chí Minh: Tổng hợp.
استشهاد بنمط شيكاغوBetsis, Andrew. Succeed in Ielts Speaking and Vocabulary: Ideal for Both the Academic and the General Training Modules. Thành phố Hồ Chí Minh: Tổng hợp, 2014.
MLA استشهادBetsis, Andrew. Succeed in Ielts Speaking and Vocabulary: Ideal for Both the Academic and the General Training Modules. Thành phố Hồ Chí Minh: Tổng hợp, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.