D. Tangian, B. D. Polii, I. C. Pontorondo, and B. F. Rondonuwu, “LEGAL PROTECTION FOR TOURISTS IN AIR-TRAVEL TOUR PACKAGES IN INDONESIA: MAPPING AIRLINE RIGHTS–OBLIGATIONS AND THE NEED FOR JOINT LIABILITY STANDARDS”, EDU, vol. 4, no. 1, pp. 227–233, Dec. 2025.