Zamzuri, Norol Hamiza, Khairil Wahidin Awang, Yuhanis Abdul Aziz, and Zaiton Samdin. 2013. “Event Sustainability Practices Among Professonal Company Organizers: An Exploratory Study”. Sains Humanika 64 (2). https://doi.org/10.11113/sh.v64n2.58.