Witoon Boonsong. 2002. Students habitat on bicycle trip to school a case study of student in Nakhon Nayok Municipality Nakhon Nayok province. Field of Study Appropriate Technology for Resource Development, Mahidol University;
Witoon Boonsong. (2002) Students habitat on bicycle trip to school a case study of student in Nakhon Nayok Municipality Nakhon Nayok province . Mahidol University/Bangkok.
Witoon Boonsong. Students habitat on bicycle trip to school a case study of student in Nakhon Nayok Municipality Nakhon Nayok province. . Bangkok:Mahidol University, 2002.
Witoon Boonsong. (2002) Students habitat on bicycle trip to school a case study of student in Nakhon Nayok Municipality Nakhon Nayok province . Mahidol University/Bangkok.