Wiersema, F. (2001). The new market leaders: Who's winning and how in the battle for customers. The Free Press.
Lua i Stíl Chicago (17ú heag.)Wiersema, Fred. The New Market Leaders: Who's Winning and How in the Battle for Customers. New York: The Free Press, 2001.
Lua MLA (9ú heag.)Wiersema, Fred. The New Market Leaders: Who's Winning and How in the Battle for Customers. The Free Press, 2001.
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