Esther Masri, Universitas 17 Agustus 1945 Semarang, Semarang,
Indonesia
Sigit Irianto, Universitas 17 Agustus 1945 Semarang, Semarang,
Indonesia
Yulies Tiena Masriani, University of 17 Agustus 1945 Semarang, Semarang,
Indonesia
Syauqi Muhammad Shobibul Falah, Al-Azhar University, Cairo,
Egypt