APA način citiranja (7. izdanje)

Okuma, P. C. (2013). Beyond witnessing: A new way of humanising the world (First edition.). Peter Lang.

Čikaški stil citiranja (17. izdanje)

Okuma, Peter Chidi. Beyond Witnessing: A New Way of Humanising the World. First edition. Frankfurt am Main ; New York: Peter Lang, 2013.

MLA način citiranja (9. izdanje)

Okuma, Peter Chidi. Beyond Witnessing: A New Way of Humanising the World. First edition. Peter Lang, 2013.