APA aipamena

Walker, B., & Smith, M. J. (1978). Upper gastrointestinal endoscopy- a survey of patients' impressions. BMJ Group.

Chicago Style aipamena

Walker, B., and M. J. Smith. Upper Gastrointestinal Endoscopy- a Survey of Patients' Impressions. BMJ Group, 1978.

MLA aipamena

Walker, B., and M. J. Smith. Upper Gastrointestinal Endoscopy- a Survey of Patients' Impressions. BMJ Group, 1978.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.