Napat pantapalangkoor. 2009. Attitudes of engineering staff in a company in the oil and gas industry towards bio fuel. Bangkok:Thammasat University;
Napat pantapalangkoor. (2009) Attitudes of engineering staff in a company in the oil and gas industry towards bio fuel (รายงานผลงานวิจัย). Thammasat University:Bangkok.
Napat pantapalangkoor. Attitudes of engineering staff in a company in the oil and gas industry towards bio fuel. Bangkok:Thammasat University, 2009.
Napat pantapalangkoor. (2009) Attitudes of engineering staff in a company in the oil and gas industry towards bio fuel (รายงานผลงานวิจัย). Thammasat University:Bangkok.