Day, J., & Jeremy Day. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoDay, Jeremy, và Jeremy Day. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
MLA引文Day, Jeremy, và Jeremy Day. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
警告:這些引文格式不一定是100%准確.