Aji B, Masfiah S, Harwanti S, Ulfah N. Factors Affecting Willingness to Pay for National Health Insurance Program among Informal Workers in Indonesia . j. info kesehat. [Internet]. 2023 Mar. 31 [cited 2024 Sep. 19];21(1):107-15. Available from: http://jurnal.poltekkeskupang.ac.id/index.php/infokes/article/view/940