Sebeena Rafi & Rafi, P. (1991). Marxism oru thirinjunottam.
Chicago Style aipamenaSebeena Rafi and Ponjikkara Rafi. Marxism Oru Thirinjunottam. Aluva, 1991.
MLA aipamenaSebeena Rafi and Ponjikkara Rafi. Marxism Oru Thirinjunottam. 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.