Dewi Azriani, et al. “IMPROVING STUDENT’S CREATIVE THINKING ABILITY AND STUDENT’S LEARNING INDEPENDENCE THROUGH AN OPEN ENDED APPROACH”. Apotema : Jurnal Program Studi Pendidikan Matematika, vol. 7, no. 1, Jan. 2021, pp. 56-65, doi:10.31597/ja.v7i1.561.