Johnsen, R., Straume, B., Førde, O. H., & Burhol, P. G. (1992). Changing incidence of peptic ulcer--facts or artefacts? A cohort study from Tromsø.
シカゴスタイル引用形Johnsen, R., B. Straume, O H. Førde, , P G. Burhol. Changing Incidence of Peptic Ulcer--facts or Artefacts? A Cohort Study From Tromsø. 1992.
MLA引用形式Johnsen, R., B. Straume, O H. Førde, , P G. Burhol. Changing Incidence of Peptic Ulcer--facts or Artefacts? A Cohort Study From Tromsø. 1992.
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