APA
Balakrishna Pillai, . (1971). Keral. : Rajpal Sons ; Delhi.
Chicago
Balakrishna Pillai, . 1971. Keral. : Rajpal Sons ; Delhi.
Harvard
Balakrishna Pillai, . (1971). Keral. : Rajpal Sons ; Delhi.
MLA
Balakrishna Pillai, . Keral. : Rajpal Sons ; Delhi. 1971.