Marno, M., R. Raflis, and F. Reni. “Code Switching in Sigapokna Language Uttered by Minangkabau People in Sigapokna, Mentawai”. Jurnal Ilmiah Pendidikan Scholastic, Vol. 3, no. 2, Aug. 2019, pp. 40-50, doi:10.36057/jips.v3i2.369.