Copeman, G. H. (1959). The role of the managing director. Business Pub.
Lua i Stíl Chicago (17ú heag.)Copeman, George Henry. The Role of the Managing Director. London: Business Pub, 1959.
Lua MLA (9ú heag.)Copeman, George Henry. The Role of the Managing Director. Business Pub, 1959.
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