World Health Organization. Vaccines and Biologicals: Who vaccine-preventable diseases: monitoring system.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Цитирование MLA (8-е изд.)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.