Umar, W. and Usman, H. 2021. Pengembangan Pembelajaran Abad 21 Berbasis Hots Matematis Melalui Strategi Mathematical Habits Of Mind. JURNAL SAINS SOSIAL DAN HUMANIORA (JSSH). 1, 2 (Dec. 2021), 37–44. DOI:https://doi.org/10.52046/jssh.v1i2.937.