RANGSIPAHT, S.; PONORTONG, S.; KUKANGWAN, T. Problems of Extension Communication in Central Administration, Dept. of Agricultural Extension in 1993. Kasetsart Journal of Social Sciences, [S. l.], v. 15, n. 1, p. 13–22, 1994. Disponível em: https://so04.tci-thaijo.org/index.php/kjss/article/view/236896. Acesso em: 16 sep. 2026.