Okuma, P. C. (2013). Beyond witnessing: A new way of humanising the world (First edition.). Peter Lang.
Lua i Stíl Chicago (17ú heag.)Okuma, Peter Chidi. Beyond Witnessing: A New Way of Humanising the World. First edition. Frankfurt am Main ; New York: Peter Lang, 2013.
Lua MLA (9ú heag.)Okuma, Peter Chidi. Beyond Witnessing: A New Way of Humanising the World. First edition. Peter Lang, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.