Cita APA (7th ed.)

Goldstein, B., & Baigent, M. (2011). English unlimited: Advanced Self-study Pack. Workbook with DVD-ROM. C1 (1a. ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Goldstein, Ben, i Maggie Baigent. English Unlimited: Advanced Self-study Pack. Workbook with DVD-ROM. C1. 1a. ed. Cambridge University Press, 2011.

Cita MLA (9th ed.)

Goldstein, Ben, i Maggie Baigent. English Unlimited: Advanced Self-study Pack. Workbook with DVD-ROM. C1. 1a. ed. Cambridge University Press, 2011.