Mulki, Z., Sapulete, J. J., & Jupri, J. (2022). Pengaruh Ladder Drill Terhadap Peningkatan Kecepatan Atlet Panjat Tebing Nomor Speed Classic Kota Balikpapan. Borneo Physical Education Journal, 3(1), 33 - 40. https://doi.org/10.30872/bpej.v3i1.1082