Perkins, W. H. (1978). Human perpsectives in speech and language disorders. The C. V. Mosby.
Citazione stile Chigago Style (17a edizione)Perkins, William H. Human Perpsectives in Speech and Language Disorders. The C. V. Mosby, 1978.
Citatione MLA (9a ed.)Perkins, William H. Human Perpsectives in Speech and Language Disorders. The C. V. Mosby, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.