Krishnakumar. (2004). Pracheen bharata ka bhaugolika parivesha. Mayank prakashan.
Chicago Edition CitationKrishnakumar. Pracheen Bharata Ka Bhaugolika Parivesha. Jwalapur: Mayank prakashan, 2004.
Cita MLAKrishnakumar. Pracheen Bharata Ka Bhaugolika Parivesha. Mayank prakashan, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.