I.O. Chukwuma, E.K. Agbaeze, N.P. Nwakoby, G.C. Ugwuja, F.O. Alaefule, I.L. Madu "The Relationship of Coalition on Employee Spiritual Engagement: Interplay of Organisational Politics", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 6, pp. 45-52 (2019).