Haykal, M., N. Dirbawanto, and O. Siregar. “Pengaruh Incentive Giving Dan Performance Productivity Terhadap Work Performance Improvement”. Jurnal Ilmiah Wahana Pendidikan, Vol. 11, no. 4.C, Apr. 2025, pp. 136-4, https://jurnal.peneliti.net/index.php/JIWP/article/view/10186.