Gramaprakasan, N. R. (2009). Koothambalam. Koothambalam Publications.
Chicago Edition CitationGramaprakasan, N. R. Koothambalam. Thrissur: Koothambalam Publications, 2009.
MLA Edition CitationGramaprakasan, N. R. Koothambalam. Koothambalam Publications, 2009.
Warning: These citations may not always be 100% accurate.