State Planning Board. (1986). Annual Plan Proposals 1987 - 88. Govt. of Kerala.
Chicago Style aipamenaState Planning Board. Annual Plan Proposals 1987 - 88. Trivandrum: Govt. of Kerala, 1986.
MLA aipamenaState Planning Board. Annual Plan Proposals 1987 - 88. Govt. of Kerala, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.