APA (7th ed.) Citation

Cotton, P. B., Tytgat, G. N. J., & Williams, C. B. (1993). Annual of gastrointestinal endoscopy (6th edition.). Current Science.

Chicago Style (17th ed.) Citation

Cotton, Peter B., Guido N. J. Tytgat, and Christopher B. Williams. Annual of Gastrointestinal Endoscopy. 6th edition. London: Current Science, 1993.

MLA (8th ed.) Citation

Cotton, Peter B., et al. Annual of Gastrointestinal Endoscopy. 6th edition. Current Science, 1993.