एपीए उद्धरण

G.R.Pillai. (1994). Vanijyaparamaya Kathidapadukal: Commercial correspondance. Kerala Bhasha Institute.

शिकागो स्टाइल उद्धरण

G.R.Pillai. Vanijyaparamaya Kathidapadukal: Commercial Correspondance. Thiruvananthapuram: Kerala Bhasha Institute, 1994.

एमएलए उद्धरण

G.R.Pillai. Vanijyaparamaya Kathidapadukal: Commercial Correspondance. Kerala Bhasha Institute, 1994.