Pairoj Kerdsamut. 2004. Factors affecting increased efficiency and effectiveness of employees working the petroleum authority of Thailand. Field of Study Business Administration, Ramkhamhaeng University;
Pairoj Kerdsamut. (2004) Factors affecting increased efficiency and effectiveness of employees working the petroleum authority of Thailand . Ramkhamhaeng University/Bangkok.
Pairoj Kerdsamut. Factors affecting increased efficiency and effectiveness of employees working the petroleum authority of Thailand. . Bangkok:Ramkhamhaeng University, 2004.
Pairoj Kerdsamut. (2004) Factors affecting increased efficiency and effectiveness of employees working the petroleum authority of Thailand . Ramkhamhaeng University/Bangkok.