Pannida Viravaidhya. 2001. The development of tourism data entry and information retrieval system for trip planning via internet. Field of Study Technology of Information System Management, Mahidol University;
Pannida Viravaidhya. (2001) The development of tourism data entry and information retrieval system for trip planning via internet . Mahidol University/Bangkok.
Pannida Viravaidhya. The development of tourism data entry and information retrieval system for trip planning via internet. . Bangkok:Mahidol University, 2001.
Pannida Viravaidhya. (2001) The development of tourism data entry and information retrieval system for trip planning via internet . Mahidol University/Bangkok.