Gupthan R K. (1976). Saamuhyavikasanavum Vyaapanavum. Kerala Bhaasha Institute.
Chicago Edition CitationGupthan R K. Saamuhyavikasanavum Vyaapanavum. Trivandrum: Kerala Bhaasha Institute, 1976.
MLA Edition CitationGupthan R K. Saamuhyavikasanavum Vyaapanavum. Kerala Bhaasha Institute, 1976.
Warning: These citations may not always be 100% accurate.