1. Joko Nurkamto | Universitas Negeri Surakarta, Indonesia
2. Ngadiso | Universitas Negeri Surakarta, Indonesia
3. Satria Agus | Universitas Raja, Indonesia
4. Lorant Denes David | Hungarian University of Agriculture and Life Sciences, Hungary
5. Gerard Marchesseau | Associate Professor Naruto University of Education
6. Johongir Mashokirov | Samarkand Branch of Tashkent State University, Uzbekistann