In’am, Akhsanul. “Analysis of First Public High SchoolMathematics Teacher’s Professionalism Competency in Malang Indonesia (1 - 11)”. Jurnal Pendidikan Sains Dan Matematik Malaysia, vol. 2, no. 1, May 2012, pp. 1-11, https://ejournal.upsi.edu.my/index.php/JPSMM/article/view/1811.