Cita APA (7th ed.)

Haycock, A., & Preston, S. (2014). Cotton and Williams' practical gastrointestinal endoscopy: The fundamentals (Seventh edition.). Wiley.

Cita Chicago (17th ed.)

Haycock, Adam, i Stephen Preston. Cotton and Williams' Practical Gastrointestinal Endoscopy: The Fundamentals. Seventh edition. Chichester, England ; West Sussex, England: Wiley, 2014.

Cita MLA (9th ed.)

Haycock, Adam, i Stephen Preston. Cotton and Williams' Practical Gastrointestinal Endoscopy: The Fundamentals. Seventh edition. Wiley, 2014.