Unnikrishnan Puthoor. (1969). Chatuppu Nilam. Sahitya Pravarthaka Co-operative Society Ltd.
シカゴスタイル引用形Unnikrishnan Puthoor. Chatuppu Nilam. Koottayam: Sahitya Pravarthaka Co-operative Society Ltd, 1969.
MLA引用形式Unnikrishnan Puthoor. Chatuppu Nilam. Sahitya Pravarthaka Co-operative Society Ltd, 1969.
警告: この引用は必ずしも正確ではありません.