Bonardo Siboro, Frisca Mareyta Pongoh, Putu Deny Darmawan, and Ikhsan Saifudin. 2024. “Digitalization of Owner’s Estimates in Procurement of Goods and Services for Ships Owned by PT PIS”. International Journal of Maritime Studies and Management 1 (4):01-10. https://jurnal.poltekpelsulut.ac.id/index.php/ijmsm/article/view/115.