Tohutoro APA (7th ed.)

Edited by ,Prof. Dhar , B. B. (2000). Mining Challenges of the 21st century. APH.

Tohutoru Kātū Chicago (17th ed.)

Edited by ,Prof. Dhar , B. B. Mining Challenges of the 21st Century. New Delhi: APH, 2000.

Tohutoro MLA (9th ed.)

Edited by ,Prof. Dhar , B. B. Mining Challenges of the 21st Century. APH, 2000.