Jeyaseelan A. Anthony. (2009). The effectiveness of geometer's sketchpad based instructional activities in learning topic circles by form four students.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jeyaseelan A. Anthony. The Effectiveness of Geometer's Sketchpad Based Instructional Activities in Learning Topic Circles by Form Four Students. 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jeyaseelan A. Anthony. The Effectiveness of Geometer's Sketchpad Based Instructional Activities in Learning Topic Circles by Form Four Students. 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.