United Nations. Economic Commission for Europe. (2016). The United Nations motorcycle helmet study. United Nations.
芝加哥风格引文United Nations. Economic Commission for Europe. The United Nations Motorcycle Helmet Study. New York: United Nations, 2016.
MLA引文United Nations. Economic Commission for Europe. The United Nations Motorcycle Helmet Study. United Nations, 2016.
警告：这些引文格式不一定是100％准确.