National Immunization Program (Centers for Disease Control and Prevention). (2015). Epidemiology and prevention of vaccine-preventable diseases: Course textbook (13th ed.). Centers for Disease Control and Prevention, National Immunization Program].
Chicago-viite (17. p.)National Immunization Program (Centers for Disease Control and Prevention). Epidemiology and Prevention of Vaccine-preventable Diseases: Course Textbook. 13th ed. Washington D.C.: Centers for Disease Control and Prevention, National Immunization Program], 2015.
MLA-viite (8. p.)National Immunization Program (Centers for Disease Control and Prevention). Epidemiology and Prevention of Vaccine-preventable Diseases: Course Textbook. 13th ed. Centers for Disease Control and Prevention, National Immunization Program], 2015.