Cita APA (7th ed.)
O'Fahey, R. S., & Spaulding, J. (1974). Kingdoms of the Sudan. Methuen ; distributed by Harper & Row, Barnes & Noble Import Division.
Cita Chicago (17th ed.)
O'Fahey, R. S., i Jay Spaulding. Kingdoms of the Sudan. London : [New York]: Methuen ; distributed by Harper & Row, Barnes & Noble Import Division, 1974.
Cita MLA (9th ed.)
O'Fahey, R. S., i Jay Spaulding. Kingdoms of the Sudan. Methuen ; distributed by Harper & Row, Barnes & Noble Import Division, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.