Holtz, H. (1999). The concise guide to becoming an independent consultant. New York: John Wiley & Sons, Inc.
Trích dẫn kiểu ChicagoHoltz, Herman. The Concise Guide to Becoming an Independent Consultant. New York: John Wiley & Sons, Inc, 1999.
MLA CitationHoltz, Herman. The Concise Guide to Becoming an Independent Consultant. New York: John Wiley & Sons, Inc, 1999.
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