Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.