1. Hempel S. The medical detective: John Snow, cholera and the mystery of the Broad Street pump: Granta Books. London: Sandra Hempel, University of California Press; 2014.
2. Johnson S. The ghost map: the story of London’s most terrifying epidemic – and how it changed science, cities, and the modern world. East Rutherford: Penguin; 2006.
3. Institute of Medicine (US). Committee on assuring the health of the public in the 21st century. The future of the public’s health in the 21st century. Washington, DC: National Academy Press; 2003.
4. Richmond JB, Kotelchuck MI. Co-ordination and development of strategies and policy for public health promotion in the United States. Oxford textbook of public health. Oxford: Oxford Medical Publications; 1991. p. 441–54.
5. Center for Disease Control. Ten great public health achievements – United States, 1900–1999. MMWR. 1999;48(12):241–3.