Citazione Stile APA (7a Edizione)

Harwood, N. (2010). English language teaching materials: Theory and practice. Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

Harwood, Nigel. English Language Teaching Materials: Theory and Practice. New York: Cambridge University Press, 2010.

Citatione MLA (8a ed.)

Harwood, Nigel. English Language Teaching Materials: Theory and Practice. Cambridge University Press, 2010.