Gaya APA
Campbell, George K., Lefler, Richard A.. ().
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Harvard Business School Publishing.
Gaya Chicago
Campbell, George K., Lefler, Richard A..
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:
Harvard Business School Publishing,
.
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Gaya MLA
Campbell, George K., Lefler, Richard A..
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:
Harvard Business School Publishing,
.
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Gaya Turabian
Campbell, George K., Lefler, Richard A..
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:
Harvard Business School Publishing,
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Print.