एपीए उद्धरण

Lakshman Singh. (2000). Oil and gas fields of India. Indian petroleum publishers.

शिकागो स्टाइल उद्धरण

Lakshman Singh. Oil and Gas Fields of India. Dehradun: Indian petroleum publishers, 2000.

एमएलए उद्धरण

Lakshman Singh. Oil and Gas Fields of India. Indian petroleum publishers, 2000.