Apiwat Muttamara. 2007. Effect of electrode materials to EDM properties on alumina ceramic. Bangkok:Thammasart University;
Apiwat Muttamara. (2007) Effect of electrode materials to EDM properties on alumina ceramic (รายงานผลงานวิจัย). Thammasart University:Bangkok.
Apiwat Muttamara. Effect of electrode materials to EDM properties on alumina ceramic. Bangkok:Thammasart University, 2007.
Apiwat Muttamara. (2007) Effect of electrode materials to EDM properties on alumina ceramic (รายงานผลงานวิจัย). Thammasart University:Bangkok.