Risma Margaretha Sinaga
发表
Pujiati Pujiati,
Risma Margaretha Sinaga,
Trisnaningsih Trisnaningsih,
2019,
Jurnal Pendidikan Progresif.
Risma Margaretha Sinaga,
Pargito Pargito,
Ridwan Leo Putra,
2016
.