Tampubolon IR, Sudjana U, Cahyadini A. National Payment Gateway (GPN) as an Instrument in Optimizing Income Tax Withdrawal on E-Commerce Transactions. JIHK [Internet]. 2020 Jan. 30 [cited 2024 Nov. 29];1(2):90-106. Available from: https://journal.stihbiak.ac.id/index.php/kyadiren/article/view/124