Zaelani, K. M., R. Marlina, and K. N. S. Effendi. “The Algebraic Thinking Profile of Junior High School Students at Extended Abstract Level of SOLO Taxonomy”. Edumatika : Jurnal Riset Pendidikan Matematika, vol. 3, no. 2, Nov. 2020, pp. 120-8, doi:10.32939/ejrpm.v3i2.599.