APA aipamena

Quartini, A., Negri, E., & La Vecchia, C. (1992). Trends in peptic ulcer mortality in Italy, 1955-1985.

Chicago Style aipamena

Quartini, A., E. Negri, and C. La Vecchia. Trends in Peptic Ulcer Mortality in Italy, 1955-1985. 1992.

MLA aipamena

Quartini, A., E. Negri, and C. La Vecchia. Trends in Peptic Ulcer Mortality in Italy, 1955-1985. 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.