APA (7th ed.) Citation

Klaassen, W. (1978). The just war: A summary. Peace research reviews.

Chicago Style (17th ed.) Citation

Klaassen, Walter. "The Just War: A Summary." Peace Research Reviews 1978.

MLA (9th ed.) Citation

Klaassen, Walter. "The Just War: A Summary." Peace Research Reviews, 1978.

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