Hariyanto, Agus, Sebhatu, Samuel, AND Munawar, Ahmad. " SERVICE INNOVATION THROUGH TECHNOLOGY AND INFORMATION SYSTEM (TIS) FACILITIES ( STUDY CASE TICKETING ONLINE IN PT. KERETA API INDONESIA)" Prosiding Forum Studi Transportasi Antar Perguruan Tinggi [Online], Volume 2 Number 2 (31 December 2015)