Relationship Between Self-Concept and Mathematics Achievement of Senior Secondary Students in Port Harcourt Metropolis. Journal of Educational and Social Research, London, U.K., v. 1, n. 4, p. 39, 2011. Disponível em: https://www.richtmann.org/journal/index.php/jesr/article/view/11744.. Acesso em: 29 apr. 2024.