ขจรนาม อ., เปรมพาณิชย์นุกูล ว., and ตันติเศรษฐ ณ., “Impact of Innovation Knowledge and Capacity on Work Efficiency of Bookkeepers in North-Eastern Region”, J Acct & Mgmt, vol. 10, no. 1, pp. 27–37, Jan. 2009.