Marno, M. et al. 2019. Code Switching in Sigapokna Language Uttered by Minangkabau People in Sigapokna, Mentawai. Jurnal Ilmiah Pendidikan Scholastic. 3, 2 (Aug. 2019), 40–50. DOI:https://doi.org/10.36057/jips.v3i2.369.