Julia, J., Gunara, S., Supriyadi, T., Agustian, E., Ali, E. Y. ., & Budiman, A. (2022). Improving elementary school teachers’ competence in composing thematic songs: An action research. Pegem Journal of Education and Instruction, 12(1), 131–141. https://doi.org/10.47750/pegegog.12.01.12