APA (7th ed.) Citation

Duffy, M. R., Wood, R. J., & Alexander-Williams, M. (2003). Safety and effectiveness of epidurals. Blackwell Science Ltd.

Chicago Style (17th ed.) Citation

Duffy, M. R., R. J. Wood, and M. Alexander-Williams. Safety and Effectiveness of Epidurals. Oxford, UK: Blackwell Science Ltd, 2003.

MLA (9th ed.) Citation

Duffy, M. R., et al. Safety and Effectiveness of Epidurals. Blackwell Science Ltd, 2003.