Qian Hui, Ng, and Rohayu Mohd Salleh. “Determination of Courier’s Routes Delivery for Distributing Parcels in Perak”. Enhanced Knowledge in Sciences and Technology, vol. 2, no. 2, Nov. 2022, pp. 197-0, https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/5310.