Nur Rahman, University of Muhammadiyah Cirebon, Indonesia [ID Scopus]

Yusak Elisa Reba, University of Cenderawasih, Indonesia [Scholar]

Hasudungan Sinaga, University of Tama Jagakarsa, Indonesia [Scholar]

Richard J. Hewitt, The James Hutton Institute, Aberdeen, United Kingdom [ID Scopus]

Rene Faruk Garzozi-Pincay, Universidad Estatal Península de Santa Elena, Ecuador [ID Scopus]

Santiago Alonso García, Universidad de Granada, Spain [ID Scopus]

Froilan Delute Mobo, Philippine Merchant Marine Academy, Philippines [ID Scopus]

Mohammed Rashel Uddin, Hiroshima University, Japan [ID Scopus]