Barker, L. L. (1971). Listening behavior. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Barker, Larry Lee. Listening Behavior. Englewood Cliffs, N.J: Prentice-Hall, 1971.
Lua MLA (9ú heag.)Barker, Larry Lee. Listening Behavior. Prentice-Hall, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.