Thawai P. The Development of English Communication Skills Training Package for Promoting Sales of Entrepreneurs in Community Enterprise, Thonburi Zone, Bangkok. SDU. Grad. J. [internet]. 2022 Oct. 15 [cited 2025 May 31];18(3):19-36. available from: https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/382