APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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