APA ציטוט

Clarkson, K. S., & West, K. P. (1993). Gastric cancer and Helicobacter pylori infection.

Citação norma Chicago

Clarkson, K S., and K P. West. Gastric Cancer and Helicobacter Pylori Infection. 1993.

ציטוט MLA

Clarkson, K S., and K P. West. Gastric Cancer and Helicobacter Pylori Infection. 1993.