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Umar,Husein. (2001). Strategic Management In Action (-). Jakarta: Gramedia Pustaka Utama.

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Umar,Husein. Strategic Management In Action. - Jakarta: Gramedia Pustaka Utama, 2001. Text.

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Umar,Husein. Strategic Management In Action. - Jakarta: Gramedia Pustaka Utama, 2001. Text.

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Umar,Husein. Strategic Management In Action. - Jakarta: Gramedia Pustaka Utama, 2001. Print.