APA

Atherton J. C., Sharp P. M., Cover T. L., Gonzalez-Valencia G., Peek R. M., Thompson S. A., Hawkey C. J. & Blaser M. J. (19991201). Vacuolating cytotoxin (vacA) alleles of Helicobacter pylori comprise two geographically widespread types, m1 and m2, and have evolved through limited recombination. : Current microbiology.

Chicago

Atherton J C, Sharp P M, Cover T L, Gonzalez-Valencia G, Peek R M, Thompson S A, Hawkey C J and Blaser M J. 19991201. Vacuolating cytotoxin (vacA) alleles of Helicobacter pylori comprise two geographically widespread types, m1 and m2, and have evolved through limited recombination. : Current microbiology.

Harvard

Atherton J. C., Sharp P. M., Cover T. L., Gonzalez-Valencia G., Peek R. M., Thompson S. A., Hawkey C. J. and Blaser M. J. (19991201). Vacuolating cytotoxin (vacA) alleles of Helicobacter pylori comprise two geographically widespread types, m1 and m2, and have evolved through limited recombination. : Current microbiology.

MLA

Atherton J C, Sharp P M, Cover T L, Gonzalez-Valencia G, Peek R M, Thompson S A, Hawkey C J and Blaser M J. Vacuolating cytotoxin (vacA) alleles of Helicobacter pylori comprise two geographically widespread types, m1 and m2, and have evolved through limited recombination. : Current microbiology. 19991201.