Prajitno, Aditia Sugiarto, and Johannes Gerardus Nirbito. “Factor Analysis on the Motivation of Driver-Partners to Design an Effective Reward System (a Study at PT HSA Surabaya)”. KnE Social Sciences 5, no. 5 (March 22, 2021): 342–353. Accessed October 20, 2021. https://knepublishing.com/index.php/KnE-Social/article/view/8821.