Muttaqin, Syariful, et al. “Language Variations In Madurese across Regions and Age Groups: Looking at Syntactic and Lexical Variations Among Regions and Age Groups”. KLAUSA (Kajian Linguistik, Pembelajaran Bahasa, Dan Sastra), vol. 3, no. 01, Sept. 2019, pp. 45-56, doi:10.33479/klausa.v3i01.193.