World Health Organization. (2011). Bugs, drugs & smoke: Stories from public health. World Health Organization.
Cita Chicago (17th ed.)World Health Organization. Bugs, Drugs & Smoke: Stories from Public Health. Geneva, Switzerland: World Health Organization, 2011.
Cita MLA (8th ed.)World Health Organization. Bugs, Drugs & Smoke: Stories from Public Health. World Health Organization, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.