JOHNSON, G. (1997). Exploring Corporate Strategy Gerry Johnson, Kevan Scholes. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)JOHNSON, Gerry. Exploring Corporate Strategy Gerry Johnson, Kevan Scholes. Prentice-Hall, 1997.
Lua MLA (8ú heag.)JOHNSON, Gerry. Exploring Corporate Strategy Gerry Johnson, Kevan Scholes. Prentice-Hall, 1997.
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