APA (7th ed.) Citation

Sen, S. N., & Das, S. K. (1965). An introduction to economic theory. Bookland Private.

Chicago Style (17th ed.) Citation

Sen, Satyendra Nath, and Sisir Kumar Das. An Introduction to Economic Theory. Calcutta: Bookland Private, 1965.

MLA (9th ed.) Citation

Sen, Satyendra Nath, and Sisir Kumar Das. An Introduction to Economic Theory. Bookland Private, 1965.