Koh Young Hun, Hankuk University of Foreign Studies, Korea, Republic of

Edwin Jurriens, Melbourne University, Australia

Suryadi Suryadi, Leiden University, Netherlands

Marzni Mohamed Mochtar, Universiti Putra Malaysia, Malaysia

Silvia Marni, Universitas PGRI Sumatera Barat, Indonesia

Harun Djoko Prayitno, Universitas Muhammadiyah Surakarta, Indonesia

Agustina Agustina, Universitas Negeri Padang, Indonesia

Yasnur Asri, Universitas Negeri Padang, Indonesia

Sawirman Sawirman, Universitas Andalas, Indonesia

Lina Meilinawati Rahayu, Universitas Padjajaran, Indonesia