Harris, M. (2006). New Oportunities education for life: Elementary students' book. Longman.
Citazione stile Chigago Style (17a edizione)Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. England: Longman, 2006.
Citatione MLA (9a ed.)Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. Longman, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.