APA

England S., Kaddar M., Nigam A., Pinto M. & World Health Organization. Department of Vaccines and Biologicals. (2001). Practice and policies on user fees for immunization in developing countries. Geneva: World Health Organization, Department of Vaccines and Biologicals.

Chicago

England Sarah, Kaddar Miloud, Nigam Ashok, Pinto Matilde and World Health Organization. Department of Vaccines and Biologicals. 2001. Practice and policies on user fees for immunization in developing countries. Geneva: World Health Organization, Department of Vaccines and Biologicals.

Harvard

England S., Kaddar M., Nigam A., Pinto M. and World Health Organization. Department of Vaccines and Biologicals. (2001). Practice and policies on user fees for immunization in developing countries. Geneva: World Health Organization, Department of Vaccines and Biologicals.

MLA

England Sarah, Kaddar Miloud, Nigam Ashok, Pinto Matilde and World Health Organization. Department of Vaccines and Biologicals. Practice and policies on user fees for immunization in developing countries. Geneva: World Health Organization, Department of Vaccines and Biologicals. 2001.