N. Joko and H. Wahyuningsih, “EXPLORING THE ENGLISH SPEAKING DIFFICULTIES FACED BY CADETS AT BAROMBONG MARINE POLYTECHNIC”, J. Penelit. Poltekbang Surabaya, vol. 5, no. 3, pp. 192–202, Nov. 2020, doi: 10.46491/jp.v5i3.504.