Cita APA (7th ed.)

Perkins, W. H. (1978). Human perpsectives in speech and language disorders. The C. V. Mosby.

Cita Chicago (17th ed.)

Perkins, William H. Human Perpsectives in Speech and Language Disorders. The C. V. Mosby, 1978.

Cita MLA (9th ed.)

Perkins, William H. Human Perpsectives in Speech and Language Disorders. The C. V. Mosby, 1978.