Prof. Dr. Syawal Gultom, M.Pd.
Universitas Negeri Medan – Indonesia
Prof. Utami Widiati, M.A., Ph.D
President of TEFLIN – Indonesia
Prof. Eku Wand
Eku Interactive – Germany
Billiana Voutchkova
Violinist – Germany
Annette Turney, M.Ed. (TESOL), M.Ed., M.Sc.
Australian Catholic University – Australia
Dr. Juliana Shak
Universiti Brunei Darussalam – Brunei Darussalam