Khali, Zetty Khairunisa, and Roslinda Rosli. “Topic Analysis of Algebraic Expressions and Algebraic Formulae in Form 1 and Form 2 Mathematics Textbooks: Analisis Topik Ungkapan Algebra Dan Rumus Algebra Dalam Buku Teks Matematik Tingkatan 1 Dan Tingkatan 2”. Jurnal Pendidikan Sains Dan Matematik Malaysia, vol. 11, no. 2, Sept. 2021, pp. 26-38, https://doi.org/10.37134/jpsmm.vol11.2.3.2021.