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Umar, Husein. (2002). Research Methods in Finance and Banking . Jakarta: Gramedia Pustaka Utama.

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Umar, Husein. Research Methods in Finance and Banking. Jakarta: Gramedia Pustaka Utama, 2002. Text.

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Umar, Husein. Research Methods in Finance and Banking. Jakarta: Gramedia Pustaka Utama, 2002. Text.

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Umar, Husein. Research Methods in Finance and Banking. Jakarta: Gramedia Pustaka Utama, 2002. Print.