Julianto, I. H., and F. Arif Lubis. “Factors Affecting Market Demand on Sports Fields Rental Business In Medan”. Agregat: Jurnal Ekonomi Dan Bisnis, vol. 6, no. 2, Sept. 2022, pp. 201-9, https://journal.uhamka.ac.id/index.php/agregat/article/view/8513.