Gaya APA

Treacy, M., Wiersema, F. (1995). The Discipline Of Market Leaders : Choose your customers, narrow your focus, dominate your market . New York: Addion-esley Publishing Company.

Gaya MLA

Treacy, Michael., Wiersema, Fred. "The Discipline Of Market Leaders : Choose your customers, narrow your focus, dominate your market". New York: Addion-esley Publishing Company, 1995. Text.