Upatham Pengpara. 1990. Studies on formation and regeneration of Agaricus bitorquis protoplast. Bangkok:Mahidol University;
Upatham Pengpara. (1990) Studies on formation and regeneration of Agaricus bitorquis protoplast (รายงานผลงานวิจัย). Mahidol University:Bangkok.
Upatham Pengpara. Studies on formation and regeneration of Agaricus bitorquis protoplast. Bangkok:Mahidol University, 1990.
Upatham Pengpara. (1990) Studies on formation and regeneration of Agaricus bitorquis protoplast (รายงานผลงานวิจัย). Mahidol University:Bangkok.