Sen, S. (1972). An Introduction to Economic Theory (26th.). Bookland Pvt. Ltd.
芝加哥风格引文Sen, S. An Introduction to Economic Theory. 26th. NULL: Bookland Pvt. Ltd, 1972.
MLA引文Sen, S. An Introduction to Economic Theory. 26th. Bookland Pvt. Ltd, 1972.
警告：这些引文格式不一定是100％准确.