SINGAL, M. (1976). Sets and numbers. R.Chand.
Chicago Style (17th ed.) ZitazioaSINGAL, M.K. Sets and Numbers. New Delhi: R.Chand, 1976.
MLA (9th ed.) ZitazioaSINGAL, M.K. Sets and Numbers. R.Chand, 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.