एपीए उद्धरण

Velayudhan, K. (2012). Sree Narayana Guru. Current Books.

शिकागो स्टाइल उद्धरण

Velayudhan, Kottukkoyikkal. Sree Narayana Guru. Kottayam: Current Books, 2012.

एमएलए उद्धरण

Velayudhan, Kottukkoyikkal. Sree Narayana Guru. Current Books, 2012.