SOMAYAJULU, M. (2012). OLYMPIAD MATHS CHALLENGER 9-10 YEARS OLD BOOK - 3. SCHOLARS HUB.
芝加哥风格引文SOMAYAJULU, MRIDULA. OLYMPIAD MATHS CHALLENGER 9-10 YEARS OLD BOOK - 3. NEW DELHI: SCHOLARS HUB, 2012.
MLA引文SOMAYAJULU, MRIDULA. OLYMPIAD MATHS CHALLENGER 9-10 YEARS OLD BOOK - 3. SCHOLARS HUB, 2012.
警告：这些引文格式不一定是100％准确.