Chang, Y. Y. (2008). Learners’ Perceived Roles and Competencies of Tutors in a Distance Education Program of a Public University in Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Chang, Yee Yar. Learners’ Perceived Roles and Competencies of Tutors in a Distance Education Program of a Public University in Malaysia. 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Chang, Yee Yar. Learners’ Perceived Roles and Competencies of Tutors in a Distance Education Program of a Public University in Malaysia. 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.