Ponsak Pongponpriwon. 1996. Effects of sulfur compounds on hydrodenitrogenation of quinoline. Bangkok:Chulalongkorn University;
Ponsak Pongponpriwon. (1996) Effects of sulfur compounds on hydrodenitrogenation of quinoline (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Ponsak Pongponpriwon. Effects of sulfur compounds on hydrodenitrogenation of quinoline. Bangkok:Chulalongkorn University, 1996.
Ponsak Pongponpriwon. (1996) Effects of sulfur compounds on hydrodenitrogenation of quinoline (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.