NAPITUPULU, Junika; 						MANULLANG, Marihot.
 The Determination of Tourist Expenditures to the Tourism Object of Gibeon Hill, Tobasa Regency.
<strong>Journal of Environmental Management and Tourism</strong>, [S.l.], v. 10, n. 8, p. 1723-1730, feb. 2020.
ISSN 2068-7729.
Available at: &lt;<a href="https://journals.aserspublishing.eu/jemt/article/view/4382" target="_new">https://journals.aserspublishing.eu/jemt/article/view/4382</a>&gt;. Date accessed: 29 apr. 2024.
doi: <a href="https://doi.org/10.14505//jemt.v10.8(40).02">https://doi.org/10.14505//jemt.v10.8(40).02</a>.