Lua APA (7ú heag.)

Pitelis, C., & Sugden, R. (1991). The Nature of the transnational firm. Routledge.

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.

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