Citação norma APA

Comfort, J. (1984). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.

Citação norma Chicago

Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1984.

Citação norma MLA

Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge University Press, 1984.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.