Marhamah Hasibuan, A., Fauzi, & Ermawati. (2025). Development of Differentiated Mathematics E-books Based on Langkat Malay Culture to Improve Students’ Functional Thinking and Critical Thinking Skills. Journal of Practice Learning and Educational Development, 5(4), 1268–1279. https://doi.org/10.58737/jpled.v5i4.878