Gordon, I. (1990). Beat the competition!: How to use competitive intelligence to develop winning business strategies (Reprint.). Blackwell.
Chicago-Zitierstil (17. Ausg.)Gordon, Ian. Beat the Competition!: How to Use Competitive Intelligence to Develop Winning Business Strategies. Reprint. Oxford u.a: Blackwell, 1990.
MLA-Zitierstil (9. Ausg.)Gordon, Ian. Beat the Competition!: How to Use Competitive Intelligence to Develop Winning Business Strategies. Reprint. Blackwell, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.