WORLD.. (1991). World development report 1991: The challenge of development. Oxford Univ. Press.
Lua i Stíl Chicago (17ú heag.)WORLD.. World Development Report 1991: The Challenge of Development. Oxford: Oxford Univ. Press, 1991.
Lua MLA (9ú heag.)WORLD.. World Development Report 1991: The Challenge of Development. Oxford Univ. Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.