Links:[1] https://pepak.sabda.org/epublish/1 [2] https://pepak.sabda.org/epublish/1/232 [3] https://pepak.sabda.org/seminar_menjadi_gsm_yang_luar_biasa [4] https://pepak.sabda.org/edisi_pepak/e_binaanak_232_masalah_penyajian_bahan_pelajaran