Kholik, A., Zulham, and M. Ali. “PELATIHAN HAND SIGNAL BAGI PENYELAM PEMULA”. Prosiding Seminar Nasional Pengabdian Kepada Masyarakat, Vol. 3, no. 1, Dec. 2022, pp. SNPPM2022P-76 , https://journal.unj.ac.id/unj/index.php/snppm/article/view/33358.