Osuala, R. C., B. B. C. Onwuagboke, and C. B. Chukwudebelu. “Implementation of Team Teaching in Selected Tertiary Institutions in Nigeria”. Journal of Educational and Social Research, vol. 5, no. 3, Sept. 2015, p. 221, https://www.richtmann.org/journal/index.php/jesr/article/view/7720.