CHEPKONGA, Susan; NDIRANGU, Kiarie Moses; SANG, Anthony K.; RONOH, Alexander K. An Evaluation of Secondary School Principals Leadership Roles and Student Participation in Sporting Activities in Nyandarua County, Kenya. International Journal for Innovation Education and Research, Dhaka, Bangladesh, v. 3, n. 11, p. 167–176, 2015. DOI: 10.31686/ijier.vol3.iss11.481. Disponível em: https://scholarsjournal.net/index.php/ijier/article/view/481.. Acesso em: 22 jul. 2024.