Yaakub, Y., and Z. Yaacob. “Elemen Kritikal Kualiti Perkhidmatan Polis Terhadap Kepuasan Pelanggan Di Malaysia”. Labuan E-Journal of Muamalat and Society (LJMS), vol. 12, June 2018, pp. 148-57, doi:10.51200/ljms.v12i.1389.