APA citiranje

Colley, S. J., Gledhill, T., & Colin-Jones, D. G. (1981). Gastric ulcer: Is endoscopy always necessary?

Citação norma Chicago

Colley, S J., T. Gledhill, and D G. Colin-Jones. Gastric Ulcer: Is Endoscopy Always Necessary? 1981.

MLA citiranje

Colley, S J., T. Gledhill, and D G. Colin-Jones. Gastric Ulcer: Is Endoscopy Always Necessary? 1981.