APA (7th ed.) Citation
Pallen, M. J., & Clayton, C. L. (1990). Vaccination against Helicobacter pylori urease. Lancet, 336(8708), 186-188.
Chicago Style (17th ed.) Citation
Pallen, M J., and C L. Clayton. "Vaccination Against Helicobacter Pylori Urease." Lancet 336, no. 8708 (1990): 186-188.
MLA (9th ed.) Citation
Pallen, M J., and C L. Clayton. "Vaccination Against Helicobacter Pylori Urease." Lancet, vol. 336, no. 8708, 1990, pp. 186-188.
Warning: These citations may not always be 100% accurate.