Johnsson, H. (1990). Professional communications for a change. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Johnsson, Hans. Professional Communications for a Change. New York: Prentice-Hall, 1990.
Lua MLA (9ú heag.)Johnsson, Hans. Professional Communications for a Change. Prentice-Hall, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.