Pan, Xia Pan, and Jeffrey E Jarrett. “The Evaluation of Logistics-Oriented Economic Development Level Based on Principal Component Analysis and Cluster Analysis: The Case of Guangdong Province”. Asian Journal of Empirical Research 5, no. 3 (March 16, 2015): 40–51. Accessed July 22, 2024. https://archive.aessweb.com/index.php/5004/article/view/3834.