Sinaga, Agustina Mayen Rilen, et al. “Eksplorasi Tepak Sirih Melayu Deli Terhadap Konsep Geometri”. Jurnal Pendidikan Tambusai, vol. 8, no. 2, Aug. 2024, pp. 36111-5, http://jptam.org/index.php/jptam/article/view/19368.