Cita APA (7th ed.)

Doff, A., Lloyd, M., Thake, R., & Brabben, C. (2010). English unlimited: Elementary Teacher's Pack. A2. Cambridge University Press.

Cita Chicago (17th ed.)

Doff, Adrian, Mark Lloyd, Rachel Thake, i Cathy Brabben. English Unlimited: Elementary Teacher's Pack. A2. Cambridge University Press, 2010.

Cita MLA (9th ed.)

Doff, Adrian, et al. English Unlimited: Elementary Teacher's Pack. A2. Cambridge University Press, 2010.