APA (7th ed.) Citation

Brennan, L. (2003). Business etiquette for the 21st century: What to do - and what not to do. Piatkus.

Chicago Style (17th ed.) Citation

Brennan, Lynne. Business Etiquette for the 21st Century: What to Do - and What Not to Do. London: Piatkus, 2003.

MLA (9th ed.) Citation

Brennan, Lynne. Business Etiquette for the 21st Century: What to Do - and What Not to Do. Piatkus, 2003.