BHATNAGAR O P. (1985). EDUCATION AND COMMUNICTION FOR DEVELOPMENT (2.). OXFORD UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)BHATNAGAR O P. EDUCATION AND COMMUNICTION FOR DEVELOPMENT. 2. DELHI BOMBAY: OXFORD UNIVERSITY PRESS, 1985.
Lua MLA (9ú heag.)BHATNAGAR O P. EDUCATION AND COMMUNICTION FOR DEVELOPMENT. 2. OXFORD UNIVERSITY PRESS, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.