APA (7th ed.) Citation

Sen, S. (1972). An Introduction to Economic Theory (26th.). Bookland Pvt. Ltd.

Chicago Style (17th ed.) Citation

Sen, S. An Introduction to Economic Theory. 26th. NULL: Bookland Pvt. Ltd, 1972.

MLA (9th ed.) Citation

Sen, S. An Introduction to Economic Theory. 26th. Bookland Pvt. Ltd, 1972.