Comfort, J. (1984). Speaking effectively: Developing speaking skills for business English. Cambridge University Press.
Citação do estilo Chicago (17ª ed.)Comfort, Jeremy. Speaking Effectively: Developing Speaking Skills for Business English. Cambridge: Cambridge University Press, 1984.
Citação MLA (8ª ed.)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.