Lakshman Singh. (2000). Oil and gas fields of India. Indian petroleum publishers.
シカゴスタイル引用形Lakshman Singh. Oil and Gas Fields of India. Dehradun: Indian petroleum publishers, 2000.
MLA引用形式Lakshman Singh. Oil and Gas Fields of India. Indian petroleum publishers, 2000.
警告: この引用は必ずしも正確ではありません.