Baxter, S., & Woodbridge, T. (2002). Success with Cels: Preliminary, a preparation course for the certificates in english language skills (1a. ed.). Summertown.
Citazione stile Chigago Style (17a edizione)Baxter, Steve, e Teresa Woodbridge. Success with Cels: Preliminary, a Preparation Course for the Certificates in English Language Skills. 1a. ed. Oxford: Summertown, 2002.
Citatione MLA (9a ed.)Baxter, Steve, e Teresa Woodbridge. Success with Cels: Preliminary, a Preparation Course for the Certificates in English Language Skills. 1a. ed. Summertown, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.