APA ציטוט

Loffeld, R. J., & Stobberingh, E. (1991). Helicobacter pylori and ABO blood groups.

Citação norma Chicago

Loffeld, R J., and E. Stobberingh. Helicobacter Pylori and ABO Blood Groups. 1991.

ציטוט MLA

Loffeld, R J., and E. Stobberingh. Helicobacter Pylori and ABO Blood Groups. 1991.