Yatini, Erna Apriliani, & Soetrisno. (2005). Penentuan Koefisien Daya Angkat Pesawat Terbang Layang Terhadap Gerakan Angin Vertikal. imits: ournal of athematics and ts pplications, 2(1), 9. etrieved from https://journal.its.ac.id/index.php/limits/article/view/5302