APA (7th ed.) Citation

Birn, D. S. (1974). The League of Nations Union and collective security. Journal of contemporary history.

Chicago Style (17th ed.) Citation

Birn, Donald S. "The League of Nations Union and Collective Security." Journal of Contemporary History 1974.

MLA (8th ed.) Citation

Birn, Donald S. "The League of Nations Union and Collective Security." Journal of Contemporary History, 1974.

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