Cita APA (7a ed.)

Doff, A. (2016). Empower C1: Advanced student's book. Cambridge University Press.

Cita Chicago Style (17a ed.)

Doff, Adrian. Empower C1: Advanced Student's Book. Cambridge, United Kingdom: Cambridge University Press, 2016.

Cita MLA (9a ed.)

Doff, Adrian. Empower C1: Advanced Student's Book. Cambridge University Press, 2016.