Syaifuddinn, syaifuddin., Rosben Sihombing, and Robert Tua Siregar. 2025. “Determinants Of Entrepreneurship In PT Propertindo Bersinar Pematang Siantar”. PUBLISH BUKU UNPRI PRESS ISBN 1 (1). https://jurnal.unprimdn.ac.id/index.php/ISBN/article/view/6451.