Mansur, K., R. Jani, R. Idris, A. Othman, C. Geetha, S. Aralas, R. Yusoff, M. A. A. Abu Bakar, and M. F. Kamar. “Changes in Border Security Policy: Impact on Businesses in Sabah”. Malaysian Journal of Business and Economics (MJBE), vol. 6, no. 1, Aug. 2019, p. 15, doi:10.51200/mjbe.v0i0.1853.