Day, R. H., & Singh, I. (1977). Economic development as an adaptive process: The green revolution in the Indian Punjab. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Day, Richard Hollis, agus Inderjit Singh. Economic Development as an Adaptive Process: The Green Revolution in the Indian Punjab. Cambridge: Cambridge University Press, 1977.
Lua MLA (9ú heag.)Day, Richard Hollis, agus Inderjit Singh. Economic Development as an Adaptive Process: The Green Revolution in the Indian Punjab. Cambridge University Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.