Pengaruh Standar Operasional Prosedur (SOP) terhadap Kualitas Pelayanan Kafe Fifty Fifty Jember. JBMWS [Internet]. 2024 Aug. 30 [cited 2025 Jun. 5];3(03):291-304. Available from: https://wnj.westsciences.com/index.php/jbmws/article/view/1472