Retnaningtyas, H. R. E., M. R. Nababan, and D. Purnanto. “Language Code Choice of Male Abdi Dalem of Karaton Ngayogyakarta Hadiningrat”. Lingua Cultura, vol. 13, no. 2, June 2019, pp. 99-105, doi:10.21512/lc.v13i1.5326.