Παραπομπή σε μορφή APA (7η εκδ.)

Okolo, B. A. Indirectness in discourse: A study in paradoxical communication among the Igbos / Bertram A. Okolo. The language of African literature.(1998).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Okolo, Bertram A. "Indirectness in Discourse: A Study in Paradoxical Communication Among the Igbos / Bertram A. Okolo." The Language of African Literature.(1998) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Okolo, Bertram A. "Indirectness in Discourse: A Study in Paradoxical Communication Among the Igbos / Bertram A. Okolo." The Language of African Literature.(1998), .