Burkan, W. C. (1996). Wide-Angle vision: Beat your competition by tocusing on fringe competitors, lost customers, and rogue employees. Wiley.
Citace podle Chicago (17th ed.)Burkan, Wayne C. Wide-Angle Vision: Beat Your Competition by Tocusing on Fringe Competitors, Lost Customers, and Rogue Employees. New York: Wiley, 1996.
Citace podle MLA (9th ed.)Burkan, Wayne C. Wide-Angle Vision: Beat Your Competition by Tocusing on Fringe Competitors, Lost Customers, and Rogue Employees. Wiley, 1996.
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