Ezzatul Adahwiyah, et al. “Keperluan Terhadap Pekerjaan Sambilan Dalam Kalangan Pekerja B40”. Research in Management of Technology and Business, vol. 2, no. 1, June 2021, pp. 1-16, https://publisher.uthm.edu.my/periodicals/index.php/rmtb/article/view/1934.