1-. Strategies for Selecting and Verifying Hearing Aid Fittings, Michael Valente, Thieme,1994.
2. Hair Cells and Hearing Aids, Charles berlin, Singular Publishing Group,1996.
3. Hearing aids: Standards,Options and Limitations, Michael Valente,Thieme,1996.
4. Compression for Clinicians, Theodore H.Venema, singular Publishing Group,1998.
5. Hearing Aids, Harvey Dillon, Boomerang press,2001