Cita APA (7a ed.)

Ashby, P. (2005). Speech sounds (2nd ed.). Routledge.

Cita Chicago Style (17a ed.)

Ashby, Patricia. Speech Sounds. 2nd ed. London: Routledge, 2005.

Cita MLA (9a ed.)

Ashby, Patricia. Speech Sounds. 2nd ed. Routledge, 2005.