Mute, G.N. , K’Obonyo, P. , Ogutu, M. and Njihia, J. 2020. Principal’s Facial Expression, Organization Citizenship Behaviour and Performance of Secondary Schools in Nairobi. American Journal of Education and Learning. 5, 1 (Sep. 2020), 134–140. DOI:https://doi.org/10.20448/804.5.1.134.140.