Clifford, J. (1978). Aspects of economic development 1760 to 1960. Longman.
Lua i Stíl Chicago (17ú heag.)Clifford, James. Aspects of Economic Development 1760 to 1960. London: Longman, 1978.
Lua MLA (9ú heag.)Clifford, James. Aspects of Economic Development 1760 to 1960. Longman, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.