Jefry, et al. “PENERAPAN SOP DALAM MENINGKATKAN KUALITAS KINERJA NIGHT AUDIT DI SOVRANO HOTEL BATAM”. JURNAL MEKAR, vol. 3, no. 2, Oct. 2024, pp. 39-46, https://jurnal.btp.ac.id/index.php/mekar-btp/article/view/311.