Cita APA (7th ed.)

Doff, A., & Robinson, N. (2010). English unlimited: Starter. Self-study Pack. Workbook with DVD-ROM. A1. Cambridge University Press.

Cita Chicago (17th ed.)

Doff, Adrian, i Nick Robinson. English Unlimited: Starter. Self-study Pack. Workbook with DVD-ROM. A1. Cambridge: Cambridge University Press, 2010.

Cita MLA (9th ed.)

Doff, Adrian, i Nick Robinson. English Unlimited: Starter. Self-study Pack. Workbook with DVD-ROM. A1. Cambridge University Press, 2010.