Cita APA (7a ed.)

Collie, J., & Slater, S. (1992). Speaking 3. Cambridge University Press.

Cita Chicago Style (17a ed.)

Collie, Joanne, y Stephen Slater. Speaking 3. Great Britain: Cambridge University Press, 1992.

Cita MLA (9a ed.)

Collie, Joanne, y Stephen Slater. Speaking 3. Cambridge University Press, 1992.