Não informado. (1980). Journal of Business Strategy. Warren, Gorham & Lamont.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Business Strategy. Boston, Mass: Warren, Gorham & Lamont, 1980.
Lua MLA (8ú heag.)Não informado. Journal of Business Strategy. Warren, Gorham & Lamont, 1980.
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