Παραπομπή APA

Unnikrishnan Puthoor. (1969). Chatuppu Nilam. Sahitya Pravarthaka Co-operative Society Ltd.

Παραπομπή Chicago Style

Unnikrishnan Puthoor. Chatuppu Nilam. Koottayam: Sahitya Pravarthaka Co-operative Society Ltd, 1969.

Παραπομπή MLA

Unnikrishnan Puthoor. Chatuppu Nilam. Sahitya Pravarthaka Co-operative Society Ltd, 1969.