Kittichotipun Y, Thamma-apipon S. Guidelines for Communication Process in Enhancing Purchasing Efficiency: A Case study of Beverage Manufacturer in Nakhonpathom Province. J of CIM [internet]. 2020 Dec. 30 [cited 2026 Aug. 28];5(-):71-84. available from: https://so03.tci-thaijo.org/index.php/journalcim/article/view/246775