Velayudhan Panikkassery. (2002). Dr. Palpu. Current.
Chicago Style aipamenaVelayudhan Panikkassery. Dr. Palpu. Kottayam: Current, 2002.
MLA aipamenaVelayudhan Panikkassery. Dr. Palpu. Current, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.