APA ציטוט

Boyanova, L., Koumanova, R., Jelev, C., & Petrov, S. (1997). Helicobacters in Bulgarian children.

Citação norma Chicago

Boyanova, L., R. Koumanova, C. Jelev, and S. Petrov. Helicobacters in Bulgarian Children. 1997.

ציטוט MLA

Boyanova, L., R. Koumanova, C. Jelev, and S. Petrov. Helicobacters in Bulgarian Children. 1997.