Jeffrey, R. C., & Peterson, O. (1989). Speech: A basic text (3rd ed.). Harper and Row.
Lua i Stíl Chicago (17ú heag.)Jeffrey, Robert C., agus Owen Peterson. Speech: A Basic Text. 3rd ed. New York: Harper and Row, 1989.
Lua MLA (9ú heag.)Jeffrey, Robert C., agus Owen Peterson. Speech: A Basic Text. 3rd ed. Harper and Row, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.