Lua APA (7ú heag.)

(1979). Communication concepts and skills / Robert Hopper and Jack L. Whitehead, Jr.

Lua i Stíl Chicago (17ú heag.)

Communication Concepts and Skills / Robert Hopper and Jack L. Whitehead, Jr. 1979.

Lua MLA (9ú heag.)

Communication Concepts and Skills / Robert Hopper and Jack L. Whitehead, Jr. 1979.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.