Oktapia, Lisa, and Lailatun Nur Kamalia Siregar. “Development of LKPD Based on Contextual Teaching and Learning on Square and Rectangular Materials to Improve Learning Outcomes of Grade IV Elementary School Students”. Mathline : Jurnal Matematika Dan Pendidikan Matematika, vol. 8, no. 3, Aug. 2023, pp. 937-54, doi:10.31943/mathline.v8i3.479.