Lua APA (7ú heag.)

Hill, F. E., & Williams, W. (1941). Radio's listening groups: The United States and Great Britain. Columbia University Press.

Lua i Stíl Chicago (17ú heag.)

Hill, Frank Ernest, agus W.E Williams. Radio's Listening Groups: The United States and Great Britain. New York: Columbia University Press, 1941.

Lua MLA (8ú heag.)

Hill, Frank Ernest, agus W.E Williams. Radio's Listening Groups: The United States and Great Britain. Columbia University Press, 1941.

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