Turnip, Berlian Romanus. “The Jigsaw Method in Didactical Analysis of Indonesian National Songs by W.R. Supratman at Fifth Grade Students PBSI FKIP-USI.” International Journal of English Literature and Social Sciences, vol. 5, no. 4, 2020, pp. 1190–94. Crossref, https://doi.org/10.22161/ijels.54.50.