APA
World Health Organization, . (1983). International health regulations (1969): adopted by the 22nd world health assembly in 1969 and amended by the 26th world health assembly in 1973 and the 34th world health assembly in 1981. Geneva: World Health Oraganization.
Chicago
World Health Organization, . 1983. International health regulations (1969): adopted by the 22nd world health assembly in 1969 and amended by the 26th world health assembly in 1973 and the 34th world health assembly in 1981. Geneva: World Health Oraganization.
Harvard
World Health Organization, . (1983). International health regulations (1969): adopted by the 22nd world health assembly in 1969 and amended by the 26th world health assembly in 1973 and the 34th world health assembly in 1981. Geneva: World Health Oraganization.
MLA
World Health Organization, . International health regulations (1969): adopted by the 22nd world health assembly in 1969 and amended by the 26th world health assembly in 1973 and the 34th world health assembly in 1981. Geneva: World Health Oraganization. 1983.