Kranarong Nilthamorn. 2001. The quality of work life of the traffic police in Bangkok Metropolitan. Field of Study Criminology and Criminal Justics, Mahidol University;
Kranarong Nilthamorn. (2001) The quality of work life of the traffic police in Bangkok Metropolitan . Mahidol University/Bangkok.
Kranarong Nilthamorn. The quality of work life of the traffic police in Bangkok Metropolitan. . Bangkok:Mahidol University, 2001.
Kranarong Nilthamorn. (2001) The quality of work life of the traffic police in Bangkok Metropolitan . Mahidol University/Bangkok.