APA (7th ed.) Citation

Simkins, J. (1965). The just war in Aquinas and Grotius. S. P. C. K..

Chicago Style (17th ed.) Citation

Simkins, Joan. The Just War in Aquinas and Grotius. London: S. P. C. K., 1965.

MLA (9th ed.) Citation

Simkins, Joan. The Just War in Aquinas and Grotius. S. P. C. K., 1965.