S. Atawongsa, N. Kanthachai, S. . Phithaksikul, S. . Siriwiwattanakul, and J. Upatham, “The Factors Affecting Operational Efficiency of Franchise Entrepreneurs in Chiang Rai Province”, J. Mange. Sci. CRRU, vol. 16, no. 1, pp. 149–173, Jun. 2021.