Pagiling, Sadrack Luden, and Khumaeroh Dwi Nur’aini. 2022. “Specialized Content Knowledge Lower Secondary School Teachers on Quadrilaterals”. PYTHAGORAS Jurnal Matematika Dan Pendidikan Matematika 17 (1):333-45. https://doi.org/10.21831/pythagoras.v17i1.42446.