Citazione Stile APA (7a Edizione)

Harris, M. M. (2008). New opportunities: Education for life : intermediate (2nd ed., 6th imp.). Pearson-Longman.

Citazione stile Chigago Style (17a edizione)

Harris, Michael Mower. New Opportunities: Education for Life : Intermediate. 2nd ed., 6th imp. London: Pearson-Longman, 2008.

Citatione MLA (9a ed.)

Harris, Michael Mower. New Opportunities: Education for Life : Intermediate. 2nd ed., 6th imp. Pearson-Longman, 2008.