APA aipamena

Essinger, J., & Wylie, H. (1999). The seven deadly skills of competing. London: International Thomson Business Press.

Chicago Style aipamena

Essinger, James., và Helen Wylie. The Seven Deadly Skills of Competing. London: International Thomson Business Press, 1999.

MLA aipamena

Essinger, James., và Helen Wylie. The Seven Deadly Skills of Competing. London: International Thomson Business Press, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.