Ali, M. S. (1998). Brain Twister Delightful Mathematics. University Press Limited.
Chicago Style (17th ed.) ZitazioaAli, M. Shamser. Brain Twister Delightful Mathematics. Dhaka: University Press Limited, 1998.
MLA (9th ed.) ZitazioaAli, M. Shamser. Brain Twister Delightful Mathematics. University Press Limited, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.