Yahya Saleh Ibrahim

School of Technology Management and Logistics, University Utara Malaysia, College of Business, 06010 UUM Sintok, Kedah Darul Aman Malaysia

Shahimi bin Mohtar

School of Technology Management and Logistics, University Utara Malaysia, College of Business, 06010 UUM Sintok, Kedah Darul Aman Malaysia

Muhammad Abdullahi Sabo

Departments of Environmental Science & Education (Technical) Kaduna Polytechnic Kaduna Nigeria

Mohd Kamarul Irwan Abdul Rahim

School of Technology Management and Logistics, University Utara Malaysia, College of Business, 06010 UUM Sintok, Kedah Darul Aman Malaysia

Ahmad Shabudin Ariffin

Departments of Environmental Science & Education (Technical) Kaduna Polytechnic Kaduna Nigeria