Noor, Khairul Baharein Mohd, and Kamariah Dola. 2013. “Towards Low Carbon Society: Exploring Users Perceptions on the Service Quality Level Performance of Public Transport Staff in the Klang Valley”. International Journal of Management and Sustainability 2 (8):138-49. https://doi.org/10.18488/journal.11/2013.2.8/11.8.138.149.