APA citiranje

Stewart, R. D., & Sheffield, J. S. (2013). Hepatitis B Vaccination in Pregnancy in the United States. Vaccines (Basel).

Citação norma Chicago

Stewart, Robert D., and Jeanne S. Sheffield. "Hepatitis B Vaccination in Pregnancy in the United States." Vaccines (Basel) 2013.

MLA citiranje

Stewart, Robert D., and Jeanne S. Sheffield. "Hepatitis B Vaccination in Pregnancy in the United States." Vaccines (Basel) 2013.