Citazione Stile APA (7a Edizione)

Doff, A., Stirling, J., & Ackroyd, S. (2011). English unlimited: Advanced Teacher's Pack. C1 (1a. ed.). Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

Doff, Adrian, Johanna Stirling, e Sarah Ackroyd. English Unlimited: Advanced Teacher's Pack. C1. 1a. ed. Cambridge University Press, 2011.

Citatione MLA (9a ed.)

Doff, Adrian, et al. English Unlimited: Advanced Teacher's Pack. C1. 1a. ed. Cambridge University Press, 2011.