Sommanee, Piyada, Tongfu Siriwongse, and Sompon Thungwha. 2022. “Factors affecting engagement the organization of businessmen of the GiffarinenetworkGiffarine Skyline Unity Company Limited (Thailand)”. Journal of Modern Learning Development 7 (10):122-36. https://so06.tci-thaijo.org/index.php/jomld/article/view/257661.