Citazione Stile APA (7a Edizione)

Johnson, K., & Morrow, K. (1979). Approaches: A language activation course for intermediate students. Cambridge University.

Citazione stile Chigago Style (17a edizione)

Johnson, Keith, e Keith Morrow. Approaches: A Language Activation Course for Intermediate Students. Cambridge: Cambridge University, 1979.

Citatione MLA (9a ed.)

Johnson, Keith, e Keith Morrow. Approaches: A Language Activation Course for Intermediate Students. Cambridge University, 1979.