एपीए उद्धरण

Nilapatmanabhan. (1987). Erumpukal. Sahitya Pravarthaka Co-operative Society Ltd.

शिकागो स्टाइल उद्धरण

Nilapatmanabhan. Erumpukal. Kottayam: Sahitya Pravarthaka Co-operative Society Ltd, 1987.

एमएलए उद्धरण

Nilapatmanabhan. Erumpukal. Sahitya Pravarthaka Co-operative Society Ltd, 1987.