APA Citation

Sen, S. K. (1967). An introduction to international relations from 1919 to present day. Calcutta: Progrssive pub.

Chicago Style Citation

Sen, Sunil Kumar. An Introduction to International Relations From 1919 to Present Day. Calcutta: Progrssive pub, 1967.

MLA Citation

Sen, Sunil Kumar. An Introduction to International Relations From 1919 to Present Day. Calcutta: Progrssive pub, 1967.

Warning: These citations may not always be 100% accurate.