Singh, H. (1978). Science and our age. Allied Pub.
Lua i Stíl Chicago (17ú heag.)Singh, H. Science and Our Age. Bombay: Allied Pub, 1978.
Lua MLA (9ú heag.)Singh, H. Science and Our Age. Allied Pub, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.