COOPER, D. R. Metode penelitian bisnis. Jilid 2.ed. 5. Erlangga.
Chicago Style (17th ed.) CitationCOOPER, Donald R. Metode Penelitian Bisnis. Jilid 2.ed. 5. Erlangga.
MLA (8th ed.) CitationCOOPER, Donald R. Metode Penelitian Bisnis. Jilid 2.ed. 5. Erlangga.
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