409334 Roberts, J. (1985). Steps to fluency: A short course in communication. Oxford : Pergamon.
Lua i Stíl Chicago (17ú heag.)409334 Roberts, Jon. Steps to Fluency: A Short Course in Communication. Oxford : Pergamon, 1985.
Lua MLA (9ú heag.)409334 Roberts, Jon. Steps to Fluency: A Short Course in Communication. Oxford : Pergamon, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.