Showers, V. (1973). The world in figures. Wiley.
芝加哥风格引文Showers, Victor. The World in Figures. New York: Wiley, 1973.
MLA引文Showers, Victor. The World in Figures. Wiley, 1973.
警告：这些引文格式不一定是100％准确.
APA引文
Showers, V. (1973). The world in figures. Wiley.
芝加哥风格引文Showers, Victor. The World in Figures. New York: Wiley, 1973.
MLA引文Showers, Victor. The World in Figures. Wiley, 1973.