APA
World Health Organization. Depart. of Vaccines and Biologicals, . (2001). Making surveillance work : Module 1: Rapid assessment of surveillance for vaccine-preventable diseases. Geneva: World Health Organization.
Chicago
World Health Organization. Depart. of Vaccines and Biologicals, . 2001. Making surveillance work : Module 1: Rapid assessment of surveillance for vaccine-preventable diseases. Geneva: World Health Organization.
Harvard
World Health Organization. Depart. of Vaccines and Biologicals, . (2001). Making surveillance work : Module 1: Rapid assessment of surveillance for vaccine-preventable diseases. Geneva: World Health Organization.
MLA
World Health Organization. Depart. of Vaccines and Biologicals, . Making surveillance work : Module 1: Rapid assessment of surveillance for vaccine-preventable diseases. Geneva: World Health Organization. 2001.