(1990). Environmental health criteria 99. World Health Organization.
Chicago Style (17th ed.) CitationEnvironmental Health Criteria 99. Ginebra: World Health Organization, 1990.
ציטוט MLAEnvironmental Health Criteria 99. World Health Organization, 1990.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.