Darley, F. L. (1979). Evaluation of appraisal techniques in speech and language pathology. Addison-Wesley Pub.
Lua i Stíl Chicago (17ú heag.)Darley, Frederic L. Evaluation of Appraisal Techniques in Speech and Language Pathology. Reading, MA: Addison-Wesley Pub, 1979.
Lua MLA (9ú heag.)Darley, Frederic L. Evaluation of Appraisal Techniques in Speech and Language Pathology. Addison-Wesley Pub, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.