Citazione Stile APA (7a Edizione)

Langan, J. (1995). English skills with readings (3rd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Langan, John. English Skills with Readings. 3rd ed. New York: McGraw-Hill, 1995.

Citatione MLA (8a ed.)

Langan, John. English Skills with Readings. 3rd ed. McGraw-Hill, 1995.