Lua APA (7ú heag.)

Sproule, J. (1981). Communication today. Scott,Foresman.

Lua i Stíl Chicago (17ú heag.)

Sproule, J.Michael. Communication Today. Illinois: Scott,Foresman, 1981.

Lua MLA (9ú heag.)

Sproule, J.Michael. Communication Today. Scott,Foresman, 1981.

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