Styl cytowania APA

Comfort, J., Rogerson, P., & Stott, T. Speaking effectively: Developing speaking skills for business english.

Styl cytowania Chicago

Comfort, Jeremy, Pamela Rogerson, i Trish Stott. Speaking Effectively: Developing Speaking Skills for Business English. New York, Cambridge University Press.

Styl cytowania MLA

Comfort, Jeremy, et al. Speaking Effectively: Developing Speaking Skills for Business English.