Nguyen, Nguyen Thi Duc, and Le Tran Chinh. 2019. “3PL Provider Selection in Oil and Gas Industry Using the Analytic Hierarchy Process: A Case Study in Oil-Field Services Company X”. HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ECONOMICS AND BUSINESS ADMINISTRATION 9 (1):54-74. https://doi.org/10.46223/HCMCOUJS.econ.en.9.1.176.2019.