Khairanni, Sarah, et al. “DEVELOPMENT OF FLIPBOOK-BASED TEACHING MATERIALS ON BASIC TECHNICAL ELEMENTS OF OFFICE ACTIVITIES”. Jurnal Pendidikan Ekonomi, Perkantoran, Dan Akuntansi, vol. 5, no. 2, Aug. 2024, pp. 500-12, https://journal.unj.ac.id/unj/index.php/jpepa/article/view/47536.