Sreedharan, P. A. (1998). Krupaanidhiyude kottaaram.
Chicago Style aipamenaSreedharan, Perumbadavam; Author. Krupaanidhiyude Kottaaram. Kollam, Sankeerthanam Publications, 1998.
MLA aipamenaSreedharan, Perumbadavam; Author. Krupaanidhiyude Kottaaram. 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.