Purnamasari, F. ., Sukartono, F. P. . Rahmawati, Minsih, and C. . Widyasari. “Social Harmony of Wonokerto Village Society As a Source of Politeness Learning for Elementary School Students”. Jurnal Penelitian Dan Pengembangan Pendidikan, vol. 6, no. 3, Nov. 2022, pp. 473-82, doi:10.23887/jppp.v6i3.53869.