Harvey, Marcus (2015). "Engaging the Orisa: An Exploration of the Yoruba Concepts of Ibeji and Olokun as Theoretical Principles in Black Theology". Black Theology. 6 (1): 61–82. doi:10.1558/blth2008v6i1.61. ISSN1476-9948. S2CID144995131.
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Harvey, Marcus (2015). "Engaging the Orisa: An Exploration of the Yoruba Concepts of Ibeji and Olokun as Theoretical Principles in Black Theology". Black Theology. 6 (1): 61–82. doi:10.1558/blth2008v6i1.61. ISSN1476-9948. S2CID144995131.
Harvey, Marcus (2015). "Engaging the Orisa: An Exploration of the Yoruba Concepts of Ibeji and Olokun as Theoretical Principles in Black Theology". Black Theology. 6 (1): 61–82. doi:10.1558/blth2008v6i1.61. ISSN1476-9948. S2CID144995131.