S. Hi Umar and R. Fatchul Hilal, “PERANCANGAN BAGGAGE HANDLING SYSTEM (BHS) DI YOGYAKARTA INTERNATIONAL AIRPORT”, Approach: J. Teknol. Penerbangan, vol. 4, no. 1, pp. 28–35, Apr. 2020, doi: 10.46491/approach.v4i1.515.