Cita APA (7a ed.)

O'Dell, F., & Black, M. (2015). Advanced trainer: Six practice tests with answers (2nd. ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

O'Dell, Felicity, y Michael Black. Advanced Trainer: Six Practice Tests with Answers. 2nd. ed. Cambridge: Cambridge University Press, 2015.

Cita MLA (9a ed.)

O'Dell, Felicity, y Michael Black. Advanced Trainer: Six Practice Tests with Answers. 2nd. ed. Cambridge University Press, 2015.