World Health Organization. (2003). State of the world's vaccines and immunization. World Health Organisation.
シカゴスタイル引用形World Health Organization. State of the World's Vaccines and Immunization. Geneva: World Health Organisation, 2003.
MLA引用形式World Health Organization. State of the World's Vaccines and Immunization. World Health Organisation, 2003.
警告: この引用は必ずしも正確ではありません.