Jahne, J. (1972). Grama Asutranam. State Institute of Languages.
Chicago Style aipamenaJahne, Johannes. Grama Asutranam. Trivandrum: State Institute of Languages, 1972.
MLA aipamenaJahne, Johannes. Grama Asutranam. State Institute of Languages, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.