Soyinka, W. The Fourth Stage: Through the Mysteries of Ogun to the Origin of Yoruba Tragedy / Wole Soyinka. African philosophy : an anthology.(1998).

Soyinka, Wole. "The Fourth Stage: Through the Mysteries of Ogun to the Origin of Yoruba Tragedy / Wole Soyinka." African Philosophy : An Anthology.(1998) .

Soyinka, Wole. "The Fourth Stage: Through the Mysteries of Ogun to the Origin of Yoruba Tragedy / Wole Soyinka." African Philosophy : An Anthology.(1998), .