APA (7th ed.) Citation

Ferreira, C. H. T., & Silveira, T. R. d. (2012). Viral hepatitis prevention by immunization.

Chicago Style (17th ed.) Citation

Ferreira, Cristina Helena Targa, and Themis Reverbel da Silveira. Viral Hepatitis Prevention by Immunization. 2012.

MLA (8th ed.) Citation

Ferreira, Cristina Helena Targa, and Themis Reverbel da Silveira. Viral Hepatitis Prevention by Immunization. 2012.

Warning: These citations may not always be 100% accurate.