Matitaputty, C., Nusantara, T., Hidayanto, E., & Sukoriyanto. (2022). Examining the pedagogical content knowledge of in-service mathematics teachers on the permutations and combinations in the context of student mistakes. Journal on Mathematics Education, 13(3), 393–414. https://doi.org/10.22342/jme.v13i3.pp393-414