APA (7th ed.) Citation

Williams, C. B. The 'Difficult' Colonic Polyp. Wiley.

Chicago Style (17th ed.) Citation

Williams, Christopher B. The 'Difficult' Colonic Polyp. Wiley.

MLA (9th ed.) Citation

Williams, Christopher B. The 'Difficult' Colonic Polyp. Wiley.

Warning: These citations may not always be 100% accurate.