1. Department of Business, Faculty of Vocational Studies, Universitas Airlangga, Jl. Dharmawangsa Dalam Selatan No.28 - 30, Airlangga, Kec. Gubeng, Surabaya, Jawa Timur 60286, INDONESIA
2. Pertamina Patra Niaga Integrated Terminal Jakarta, Jl. Plumpang Semper No.8, RT.8/RW.1, Tugu Sel., Kec. Koja, Jkt Utara, Daerah Khusus Ibukota, Jakarta INDONESIA