Cita APA (7a ed.)

Broadbent, L., & Wetz, B. (2021). Key: Bachillerato, Batxillerat, Bacharelato, Batxilergoa. 2, Student's Book (2nd. edición.). Oxford University Press.

Cita Chicago Style (17a ed.)

Broadbent, Laura, y Ben Wetz. Key: Bachillerato, Batxillerat, Bacharelato, Batxilergoa. 2, Student's Book. 2nd. edición. Oxford: Oxford University Press, 2021.

Cita MLA (9a ed.)

Broadbent, Laura, y Ben Wetz. Key: Bachillerato, Batxillerat, Bacharelato, Batxilergoa. 2, Student's Book. 2nd. edición. Oxford University Press, 2021.