World Health Organization. (1987). Measurement in health promotion and protection. WHO.
Cita Chicago Style (17a ed.)World Health Organization. Measurement in Health Promotion and Protection. s.l.: WHO, 1987.
Cita MLA (9a ed.)World Health Organization. Measurement in Health Promotion and Protection. WHO, 1987.
Precaución: Estas citas no son 100% exactas.