Sari, Ida, and Kurniawan Atmadja. “Pelabelan Harmonis Pada Graf Hati Bolak-Balik (Hn)”. PRISMA, Prosiding Seminar Nasional Matematika 5 (February 12, 2022): 845-849. Accessed May 10, 2024. https://journal.unnes.ac.id/sju/prisma/article/view/54594.