Zaitun, Albiner Siagian, Elisa Julianti , Rita Margaretha Setianingsih. MANAGEMENT OF FOOD PROVIDER (CATERING) SERVICE IN MEDAN CITY. IJAST [Internet]. 2020Jun.1 [cited 2024May6];29(7):3798-812. Available from: http://sersc.org/journals/index.php/IJAST/article/view/23145