Suheryadi, H., and N. G. Saputra. “Analisa Ability To Pay (ATP) Dan Willingness To Pay (WTP) Penumpang MRT (Mass Rapit Transit) Jakarta”. Jurnal Sains Terapan Pariwisata, vol. 4, no. 3, Oct. 2019, pp. 440-65, https://journal.polteksahid.ac.id/index.php/jstp/article/view/375.