Ali, M. N. (1972). Inventions that changed the world Part 1. National Book Trust.
Lua i Stíl Chicago (17ú heag.)Ali, Mir Najabat. Inventions That Changed the World Part 1. New Delhi, India: National Book Trust, 1972.
Lua MLA (9ú heag.)Ali, Mir Najabat. Inventions That Changed the World Part 1. National Book Trust, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.