Lua APA (7ú heag.)

Ludlow, R., & Panton, F. (1992). The essence of effective communication. Prentice Hall.

Lua i Stíl Chicago (17ú heag.)

Ludlow, Ron, agus Fergus Panton. The Essence of Effective Communication. New York: Prentice Hall, 1992.

Lua MLA (9ú heag.)

Ludlow, Ron, agus Fergus Panton. The Essence of Effective Communication. Prentice Hall, 1992.

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