World Health Organization. (1959). Communicable diseases in schools, a survey of existing legislation. s.n.
Chicago-referens (17:e uppl.)World Health Organization. Communicable Diseases in Schools, a Survey of Existing Legislation. Geneva: s.n, 1959.
MLA-referens (9:e uppl.)World Health Organization. Communicable Diseases in Schools, a Survey of Existing Legislation. s.n, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.