Mary L. G. S. Senna and  Veruska C. Dutra and  Afonso R. Aquino,  Methodologies for Management of Sustainable Tourism: A Case Study in Jalapão/Tocantins/Brazil.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2015, vol. 104(8). 2765 - 2769
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10001994.