एपीए उद्धरण

The industrial and business directory. (1986). The industrial and business directory Kerala. National publishers.

शिकागो स्टाइल उद्धरण

The industrial and business directory. The Industrial and Business Directory Kerala. Kottayam: National publishers, 1986.

एमएलए उद्धरण

The industrial and business directory. The Industrial and Business Directory Kerala. National publishers, 1986.