Cita APA (7th ed.)

Redston, C., & Cunningham, G. (2007). Face2face: Upper intermediate student´s book. Cambridge University.

Cita Chicago (17th ed.)

Redston, Chris, i Gillie Cunningham. Face2face: Upper Intermediate Student´s Book. Cambridge: Cambridge University, 2007.

Cita MLA (9th ed.)

Redston, Chris, i Gillie Cunningham. Face2face: Upper Intermediate Student´s Book. Cambridge University, 2007.