S. Sukwara Akfan, “Optimizing English for Mechanical Engineering through Problem-Based Learning for Students of Mechanical Maintenance and Repair Engineering Study Program Fakfak State Polytechnic: Optimalisasi Pembelajaran Bahasa Inggris 2 (English for Mechanical Engineering) untuk Mahasiswa Program Studi Teknik Perawatan dan Perbaikan Mesin Politeknik Negeri Fakfak”, JIPKAM, vol. 3, no. 2, pp. 51–61, Oct. 2025.