Roy, S. (1990). Agriculture and technology in developing countries: India and Nigeria. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Roy, Sumit. Agriculture and Technology in Developing Countries: India and Nigeria. New Delhi ; Newbury Park: Sage Publications, 1990.
Lua MLA (8ú heag.)Roy, Sumit. Agriculture and Technology in Developing Countries: India and Nigeria. Sage Publications, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.