Cita APA (7a ed.)

Ireland, S., & Kosta, J. (2010). Cambridge vocabulary for PET with answers: Self study vocabulary practice. Cambridge University Press.

Cita Chicago Style (17a ed.)

Ireland, Sue, y Joanna Kosta. Cambridge Vocabulary for PET with Answers: Self Study Vocabulary Practice. Cambridge, United Kingdom: Cambridge University Press, 2010.

Cita MLA (9a ed.)

Ireland, Sue, y Joanna Kosta. Cambridge Vocabulary for PET with Answers: Self Study Vocabulary Practice. Cambridge University Press, 2010.