APA-ийн эшлэл(7 дахь хэвлэлт)

Chopra, H. (1999). Library information technology in modern era: Libraries and librarians in new millenium. Commonwealth.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Chopra, H.S. Library Information Technology in Modern Era: Libraries and Librarians in New Millenium. New Delhi: Commonwealth, 1999.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Chopra, H.S. Library Information Technology in Modern Era: Libraries and Librarians in New Millenium. Commonwealth, 1999.