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Lua i Stíl Chicago (17ú heag.)Pitelis, Christos, agus Roger Sugden. The Nature of the Transnational Firm. London ; New York: Routledge, 1991.
Lua MLA (9ú heag.)Pitelis, Christos, agus Roger Sugden. The Nature of the Transnational Firm. Routledge, 1991.