Citazione Stile APA (7a Edizione)

Godfrey, R. (2016). Empower A1: Starter Workbook with answers (1a. ed.). Cambridge University.

Citazione stile Chigago Style (17a edizione)

Godfrey, Rachel. Empower A1: Starter Workbook with Answers. 1a. ed. Cambridge: Cambridge University, 2016.

Citatione MLA (9a ed.)

Godfrey, Rachel. Empower A1: Starter Workbook with Answers. 1a. ed. Cambridge University, 2016.