Author: Kānprachum Sanœ̄ Phonngān Wičhai Mahāwitthayālai Sinlapākō̜n, Sākhā Sangkhommasāt, Manutsayasāt læ Witthayāsāt (2nd 1990 Sathāban Wičhai læ Phatthanā, Mahāwitthayālai Sinlapākō̜n)