Markonah, Markonah, Hedwigis Esti Riwayati, and Riska Kumalasari. 2023. “The Effect of Premium Income, Expenses Claim, and Underwriting on Profitability of Indonesia Joint Enterprises Insurance Companies”. Jurnal Siasat Bisnis 27 (2):219-34. https://doi.org/10.20885/jsb.vol27.iss2.art7.