Capper, W. M., & Butler, T. J. (1964). Surgery for Peptic Ulcer.
Chicago Style aipamenaCapper, W. M., and T. J. Butler. Surgery for Peptic Ulcer. 1964.
MLA aipamenaCapper, W. M., and T. J. Butler. Surgery for Peptic Ulcer. 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.