Nachadasunan Chinnonchan, Charoenwit Sompongtam, Sirima Boonkuson, Kanokkan Srisurin. Study of learning outcomes Professional Competency Group Topic Creation of Letters and Messages By learning to useBase project Of vocational certificate level 1. JMCTMCU [internet]. 2023 Dec. 31 [cited 2026 Sep. 29];5(2):45-53. available from: https://so02.tci-thaijo.org/index.php/mcupnpbcr/article/view/253774