Chonnarong Wuncha. (2017) A Model of Improving Job Performance Efficiency in Crime Prevention of Community Police Officers (Koban) of Provincial Police Region 4. <i>Journal of MCU Peace Studies</i>, <i>5</i>(1), 211-224.Chonnarong Wuncha. "A Model of Improving Job Performance Efficiency in Crime Prevention of Community Police Officers (Koban) of Provincial Police Region 4". Journal of MCU Peace Studies 5 (2017):211-224.Chonnarong Wuncha. A Model of Improving Job Performance Efficiency in Crime Prevention of Community Police Officers (Koban) of Provincial Police Region 4. Master of Arts Program in Peace Studies, Mahachulalongkornrajavidyalaya University:ม.ป.ท. 2017.