Citazione Stile APA (7a Edizione)

Sinclair, C. (2010). Grammar: A friendly approach (2nd ed.). McGraw-Hill : Open University Press.

Citazione stile Chigago Style (17a edizione)

Sinclair, Christine. Grammar: A Friendly Approach. 2nd ed. Berkshire, England ; New York, N.Y.: McGraw-Hill : Open University Press, 2010.

Citatione MLA (9a ed.)

Sinclair, Christine. Grammar: A Friendly Approach. 2nd ed. McGraw-Hill : Open University Press, 2010.