Cita APA (7th ed.)

Baxter, S., & Woodbridge, T. (2002). Success with Cels: Preliminary, a preparation course for the certificates in english language skills (1a. ed.). Summertown.

Cita Chicago (17th ed.)

Baxter, Steve, i Teresa Woodbridge. Success with Cels: Preliminary, a Preparation Course for the Certificates in English Language Skills. 1a. ed. Oxford: Summertown, 2002.

Cita MLA (9th ed.)

Baxter, Steve, i Teresa Woodbridge. Success with Cels: Preliminary, a Preparation Course for the Certificates in English Language Skills. 1a. ed. Summertown, 2002.