Suvarna Nalappat. (2003). Sudha sindhu: Upanishad swadhyayam. D C Books.
Chicago Style aipamenaSuvarna Nalappat. Sudha Sindhu: Upanishad Swadhyayam. Kottayam: D C Books, 2003.
MLA aipamenaSuvarna Nalappat. Sudha Sindhu: Upanishad Swadhyayam. D C Books, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.