Richmond, O. P. (2018). Peace: A Very Short Introduction. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Richmond, Oliver P. Peace: A Very Short Introduction. Oxford University Press, 2018.
Lua MLA (9ú heag.)Richmond, Oliver P. Peace: A Very Short Introduction. Oxford University Press, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.