Ibrahim, I., Kuswidi, I. and Arfinanti, N. 2020. Development of a Guide to Preparation of Mathematics Questions Based on Higher Order Thinking Skills and Strengthening Character Education for Middle School Teachers. Jurnal Fourier. 9, 1 (Apr. 2020), 35–42. DOI:https://doi.org/10.14421/fourier.2020.91.35-42.