WASET
    Yanto Santosa and  Catharina Yudea,  The Estimation of Bird Diversity Loss and Gain as an Impact of Oil Palm Plantation: Study Case in KJNP Estate Riau Province.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2020, vol. 160(4). 108 - 114
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10011149.