Thanu Udomwatana. 2004. Communication factors related to employee perceptions on the occupational health and safety system. Field of Study Development Communication, Kasetsart University;
Thanu Udomwatana. (2004) Communication factors related to employee perceptions on the occupational health and safety system . Kasetsart University/Bangkok.
Thanu Udomwatana. Communication factors related to employee perceptions on the occupational health and safety system. . Bangkok:Kasetsart University, 2004.
Thanu Udomwatana. (2004) Communication factors related to employee perceptions on the occupational health and safety system . Kasetsart University/Bangkok.