Widya Meistika Tinangon, Sudarman Bennu, and Nurhayadi. “PENERAPAN PENDEKATAN KETERAMPILAN PROSES PADA MATERI LIMIT FUNGSI ALJABAR”. Jurnal Elektronik Pendidikan Matematika Tadulako, vol. 7, no. 3, Mar. 2020, pp. 291-02, https://jurnalfkipuntad.com/index.php/jpmt/article/view/535.