Bhalla, A. S. (1979). Towards global action for appropriate technology. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Bhalla, A. S. Towards Global Action for Appropriate Technology. Oxford New York: Pergamon Press, 1979.
Lua MLA (9ú heag.)Bhalla, A. S. Towards Global Action for Appropriate Technology. Pergamon Press, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.