Sittichai Saelem. 1996. Competitive strategies for tank farm operations. Bangkok:Chulalongkorn University;
Sittichai Saelem. (1996) Competitive strategies for tank farm operations (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Sittichai Saelem. Competitive strategies for tank farm operations. Bangkok:Chulalongkorn University, 1996.
Sittichai Saelem. (1996) Competitive strategies for tank farm operations (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.