BIG ELEPHANT FOUNDATION. (2012). MIND TWISTER MATHS OLYMPIAD WORKBOOK- 2. BIG ELEPHANT FOUNDATION.
Chicago Style (17. basım) AtıfBIG ELEPHANT FOUNDATION. MIND TWISTER MATHS OLYMPIAD WORKBOOK- 2. BIG ELEPHANT FOUNDATION, 2012.
MLA (9th ed.) AtıfBIG ELEPHANT FOUNDATION. MIND TWISTER MATHS OLYMPIAD WORKBOOK- 2. BIG ELEPHANT FOUNDATION, 2012.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..