Wallis, R. (2003). How safe are our skies?: Assessing the airlines' response to terrorism. Praeger.
芝加哥风格引文Wallis, Rodney. How Safe Are Our Skies?: Assessing the Airlines' Response to Terrorism. Westport, Conn.: Praeger, 2003.
MLA引文Wallis, Rodney. How Safe Are Our Skies?: Assessing the Airlines' Response to Terrorism. Praeger, 2003.
警告：这些引文格式不一定是100％准确.