Παραπομπή APA

Krishnamoorthy,V. (1996). Gems and precious stones (7.). Krishnamoorthy.

Παραπομπή Chicago Style

Krishnamoorthy,V. Gems and Precious Stones. 7. Madras: Krishnamoorthy, 1996.

Παραπομπή MLA

Krishnamoorthy,V. Gems and Precious Stones. 7. Krishnamoorthy, 1996.