G.R.Pillai. (1994). Vanijyaparamaya Kathidapadukal: Commercial correspondance. Kerala Bhasha Institute.
シカゴスタイル引用形G.R.Pillai. Vanijyaparamaya Kathidapadukal: Commercial Correspondance. Thiruvananthapuram: Kerala Bhasha Institute, 1994.
MLA引用形式G.R.Pillai. Vanijyaparamaya Kathidapadukal: Commercial Correspondance. Kerala Bhasha Institute, 1994.
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