MEHROTRA C M. (2001). DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. SAGE PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)MEHROTRA C M. DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. LONDON: SAGE PUBLICATIONS, 2001.
Lua MLA (9ú heag.)MEHROTRA C M. DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. SAGE PUBLICATIONS, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.