Parames Laosinchai และผู้แต่งคนอื่นๆ. (2020) High School Students' Understanding and Retention of the Connection between Two Ways of Constructing an Ellipse. RANGSIT UNIVERSITY:ม.ป.ท.Parames Laosinchai และผู้แต่งคนอื่นๆ. 2020. High School Students' Understanding and Retention of the Connection between Two Ways of Constructing an Ellipse. ม.ป.ท.:RANGSIT UNIVERSITY;Parames Laosinchai และผู้แต่งคนอื่นๆ. High School Students' Understanding and Retention of the Connection between Two Ways of Constructing an Ellipse. ม.ป.ท.:RANGSIT UNIVERSITY, 2020. Print.