Vousden, N. (1990). The economics of trade protection. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Vousden, Neil. The Economics of Trade Protection. Cambridge ; New York: Cambridge University Press, 1990.
Lua MLA (9ú heag.)Vousden, Neil. The Economics of Trade Protection. Cambridge University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.