एपीए उद्धरण

Unnikrishnan Puthoor. (1967). Gopura Veliccam. Sahitya Pravarthaka Co-operative Society Ltd.

शिकागो स्टाइल उद्धरण

Unnikrishnan Puthoor. Gopura Veliccam. Kottayam: Sahitya Pravarthaka Co-operative Society Ltd, 1967.

एमएलए उद्धरण

Unnikrishnan Puthoor. Gopura Veliccam. Sahitya Pravarthaka Co-operative Society Ltd, 1967.