Cita APA (7a ed.)

Harris, M. (2006). New Oportunities education for life: Elementary students' book. Longman.

Cita Chicago Style (17a ed.)

Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. England: Longman, 2006.

Cita MLA (9a ed.)

Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. Longman, 2006.