Watulingas, Calvin Mercy Ebenhaezer, dan Vincentia Ratna Inggawati. “Persepsi Karyawan Front Office Department Hotel Terhadap Budaya Tipping”. Improvement: Jurnal Manajemen Dan Bisnis, vol. 1, no. 2, September 2021, hlm. 100-8, doi:10.30651/imp.v1i2.9748.