APA (7th ed.) Citation

Roberts, W. (1989). Leadership secrets of Attila the Hun. Warner Books.

Chicago Style (17th ed.) Citation

Roberts, Wess. Leadership Secrets of Attila the Hun. New York, NY: Warner Books, 1989.

MLA (9th ed.) Citation

Roberts, Wess. Leadership Secrets of Attila the Hun. Warner Books, 1989.