World Health Organization. (1971). Oral health surveys: Basic methods. [s.n.
Chicago Style (17th ed.) CitationWorld Health Organization. Oral Health Surveys: Basic Methods. Genava: [s.n, 1971.
MLA (9th ed.) CitationWorld Health Organization. Oral Health Surveys: Basic Methods. [s.n, 1971.
Warning: These citations may not always be 100% accurate.