de Cardi, C. N. (1899). "Ju-Ju Laws and Customs in the Niger Delta"(PDF). The Journal of the Anthropological Institute of Great Britain and Ireland. 29: 51–64 – via Archive.org / JSTOR.
archive.org
Boisragon, Alan Maxwell (1897). The Benin massacre. Smithsonian Libraries. London : Methuen.
Smith, H. E. (1929). "Magic and Spells on the Gold Coast". The Police Journal: Theory, Practice and Principles. 2 (2). Gold Coast Police: 316–321. doi:10.1177/0032258x2900200212. S2CID148990891.
Bever, Bep Oliver (1983). "The West African Juju Man and the Tools of his Trade". The International Journal of Crude Drug Research. 21 (3): 97–120. doi:10.3109/13880208309070623.
Smith, H. E. (1929). "Magic and Spells on the Gold Coast". The Police Journal: Theory, Practice and Principles. 2 (2). Gold Coast Police: 316–321. doi:10.1177/0032258x2900200212. S2CID148990891.