Cita APA (7a ed.)

Downs, L. J. (2008). Listening skills training. ASTD Press.

Cita Chicago Style (17a ed.)

Downs, Lisa J. Listening Skills Training. [United States]: ASTD Press, 2008.

Cita MLA (8a ed.)

Downs, Lisa J. Listening Skills Training. ASTD Press, 2008.