Downing, J. E. (1999). Teaching communication skills to students with severe disabilities. Brookes.
Chicago-Zitierstil (17. Ausg.)Downing, June E. Teaching Communication Skills to Students with Severe Disabilities. Baltimore [u.a.]: Brookes, 1999.
MLA-Zitierstil (9. Ausg.)Downing, June E. Teaching Communication Skills to Students with Severe Disabilities. Brookes, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.