Yang, Y. (2019). Effect of phase-based instruction in plane geometry using geogebra on the geometric thinking of grade seven students in China.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Yang, Yanni. Effect of Phase-based Instruction in Plane Geometry Using Geogebra on the Geometric Thinking of Grade Seven Students in China. 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Yang, Yanni. Effect of Phase-based Instruction in Plane Geometry Using Geogebra on the Geometric Thinking of Grade Seven Students in China. 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.