Ravivarma Koyithampuran. (1990). Ushakalyaanam.
Chicago Edition CitationRavivarma Koyithampuran. Ushakalyaanam. Thrissur, Kerala Sahithya Academy, 1990.
MLA Edition CitationRavivarma Koyithampuran. Ushakalyaanam. 1990.
Warning: These citations may not always be 100% accurate.