Παραπομπή σε μορφή APA (7η εκδ.)

Balewa, A. S. A. T. (1989). Shaihu Umar: A novel about slavery in Africa. Markus Wiener Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Balewa, Alhaji Sir Abubaker Tafawa. Shaihu Umar: A Novel About Slavery in Africa. España: Markus Wiener Publishing, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Balewa, Alhaji Sir Abubaker Tafawa. Shaihu Umar: A Novel About Slavery in Africa. Markus Wiener Publishing, 1989.