Okki Kurnia, Jontro Simanjuntak, Devid Trinaldo Simatupang, Nadia Widari Nasution, and N. Noviana, “PENERAPAN KUALITAS PELAYANAN BAHASA MANDARIN BAGI FRONT DESK AGENT DI BATAM 1 HOTEL”, JIRK, vol. 5, no. 8, pp. 9887–9900, Jan. 2026.