Koers On-line version ISSN 2304-8557 Print version ISSN 0023-270X
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DE WITT, Maria W. and LESSING, Anna C..Teachers' perceptions of the influence of learners' undisciplined behaviour on their working life and of the support of role-players. Koers (Online) [online]. 2013, vol.78, n.3, pp.1-9.