(1987). Forward Thinking: The Pragmatists Guide To Todays Business Trends / Robert D. Gilbreath. McGraw-Hill.
Chicago-viite (17. p.)Forward Thinking: The Pragmatists Guide To Todays Business Trends / Robert D. Gilbreath. McGraw-Hill, 1987.
MLA-viite (8. p.)Forward Thinking: The Pragmatists Guide To Todays Business Trends / Robert D. Gilbreath. McGraw-Hill, 1987.
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