Leena N. Fukey and  Surya S. Issac,  Connect among Green, Sustainability and Hotel Industry: A Prospective Simulation Study.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 85(1). 296 - 312
    [viewed 19 April 2021]. Available from: https://publications.waset.org/pdf/9997483.