Cita APA (7th ed.)

Enderby, P. M. (1987). Assistive communication aids, for the speech impaired. Churchill Livingstone.

Cita Chicago (17th ed.)

Enderby, Pamela Mary. Assistive Communication Aids, for the Speech Impaired. Edinburgh: Churchill Livingstone, 1987.

Cita MLA (9th ed.)

Enderby, Pamela Mary. Assistive Communication Aids, for the Speech Impaired. Churchill Livingstone, 1987.