Telaumbanua, R. A., and D. Adiwinata. “Pengaruh Model Problem Based Learning Terhadap Kemandirian Belajar Dan Motivasi Belajar Mahasiswa Pendidikan Bisnis Stambuk 2023 Universitas Negeri Medan”. IKRAITH-EKONOMIKA, Vol. 8, no. 2, July 2025, pp. 418-26, https://journals.upi-yai.ac.id/index.php/IKRAITH-EKONOMIKA/article/view/4845.