Gaya APA

Utley, J, C, -, P, R, -, T, S, -, D. (1994). Speaking Effectively Developing speaking skills for business english . Cambridge: Cambridge University Press.

Gaya MLA

Utley, Jeremy, Comfort, -, Pamela, Rogerson-Revell, -, Trish, Stott, -, Derek. "Speaking Effectively Developing speaking skills for business english". Cambridge: Cambridge University Press, 1994. BK.