EL KOLLI, Larbi. HOW FAR HAS " TIME -SPENT– ON-THE-TASK" BY PUPILS AND TEACHERS PROVED TO BE CRUCIAL VARIABLE IN CLASSROOM RESEARCH?. مجلة العلوم الإنسانية, Constantine, Algeria, v. 19, n. 3, p. 113–122, 2008. Disponível em: http://conferences.umc.edu.dz/h/article/view/799. Acesso em: 22 2025.