Rosidah Musa and  Rezian-na Muhammad Kassim,  Factorial Structure and Psychometric Validation of Ecotourism Experiential Value Construct: Insights from Taman Negara National Park, Malaysia.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 2288 - 2295
    [viewed 18 October 2019]. Available from: https://publications.waset.org/pdf/1957.