Lasim, Ahmad, Ikhsanul Halikin, and Kristiana Wijaya. “THE HARMONIOUS, ODD HARMONIOUS, AND EVEN HARMONIOUS LABELING”. BAREKENG: Jurnal Ilmu Matematika dan Terapan 16, no. 4 (December 15, 2022): 1131-1138. Accessed May 7, 2024. https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/5091.