Varkey, P. (1968). Ponkunnam Varkeyude natakangal. S.P.C.S..
Chicago Style aipamenaVarkey, Ponkunnam. Ponkunnam Varkeyude Natakangal. S.P.C.S., 1968.
MLA aipamenaVarkey, Ponkunnam. Ponkunnam Varkeyude Natakangal. S.P.C.S., 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.