Anek Pongsawat. 2002. Decision on helmet use by riders and passengers in motorcycle taxi services case study : Ayuthaya Municipality, Ayuthaya province. Field of Study Appropriate Technology for Resource Development, Mahidol University;
Anek Pongsawat. (2002) Decision on helmet use by riders and passengers in motorcycle taxi services case study : Ayuthaya Municipality, Ayuthaya province . Mahidol University/Bangkok.
Anek Pongsawat. Decision on helmet use by riders and passengers in motorcycle taxi services case study : Ayuthaya Municipality, Ayuthaya province. . Bangkok:Mahidol University, 2002.
Anek Pongsawat. (2002) Decision on helmet use by riders and passengers in motorcycle taxi services case study : Ayuthaya Municipality, Ayuthaya province . Mahidol University/Bangkok.