Lelono, Sarjoko, et al. “Diving Skill’s Coaching Upaya Pemberdayaan Para Relawan Search and Rescue Di Surakarta”. Jorpres (Jurnal Olahraga Prestasi), vol. 15, no. 2, Jan. 2020, pp. 57-60, doi:10.21831/jorpres.v15i2.29508.