Siddhichoke Sangsod. 1992. Extracellular hydrolases by extremely thermophilic bacteria from Teppanom Hot Spring. Chiang Mai:Chiang Mai University;
Siddhichoke Sangsod. (1992) Extracellular hydrolases by extremely thermophilic bacteria from Teppanom Hot Spring (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.
Siddhichoke Sangsod. Extracellular hydrolases by extremely thermophilic bacteria from Teppanom Hot Spring. Chiang Mai:Chiang Mai University, 1992.
Siddhichoke Sangsod. (1992) Extracellular hydrolases by extremely thermophilic bacteria from Teppanom Hot Spring (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.