Riyani Septi Indriyana (Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia)
Susilowati Susilowati (Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia)
Riyani Septi Indriyana (Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia)
Susilowati Susilowati (Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia)