WIRANATHA, Agung Suryawan.
 Sustainable Development Strategy  For Ecotourism at Tangkahan, North Sumatera.
<strong>E-Journal of Tourism</strong>, [S.l.], mar. 2015.
ISSN 2407-392X.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/eot/article/view/19437" target="_new">https://ojs.unud.ac.id/index.php/eot/article/view/19437</a>&gt;. Date accessed: 26 apr. 2024.
doi: <a href="https://doi.org/10.24922/eot.v2i1.19437">https://doi.org/10.24922/eot.v2i1.19437</a>.