Hill, F. E., & Williams, W. (1941). Radio's listening groups: The United States and Great Britain. Columbia University Press.
Chicago Style (17. basım) AtıfHill, Frank Ernest, ve W.E Williams. Radio's Listening Groups: The United States and Great Britain. New York: Columbia University Press, 1941.
MLA (8th ed.) AtıfHill, Frank Ernest, ve W.E Williams. Radio's Listening Groups: The United States and Great Britain. Columbia University Press, 1941.
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