Thammanam, O. , Chotpradit, S. and Thongsorn, P. 2019. DEVELOPMENT OF CHINESE MANDARIN WORD SPELLING ABILITY ON COMPLICATED WORDS USING CHINESE PINYIN SPELLING EXERCISES FOR MATHAYOMSUKSA 4 STUDENTS. Academic Journal of Thailand National Sports University. 11, 2 (May 2019), 321–331.