Posner, M. J. (1982). Executive essentials: The one guide to what every rising business person should know. Avon Books.
Chicago-viite (17. p.)Posner, Mitchell J. Executive Essentials: The One Guide to What Every Rising Business Person Should Know. New York: Avon Books, 1982.
MLA-viite (9. p.)Posner, Mitchell J. Executive Essentials: The One Guide to What Every Rising Business Person Should Know. Avon Books, 1982.
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