HEAD, S. W. (1982). Broadcasting In America A Survey Of Television, Radio And New Technologies Sydney W. Head And Christopher H. Sterling. Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)HEAD, Sydney W. Broadcasting In America A Survey Of Television, Radio And New Technologies Sydney W. Head And Christopher H. Sterling. Houghton Mifflin Company, 1982.
Lua MLA (8ú heag.)HEAD, Sydney W. Broadcasting In America A Survey Of Television, Radio And New Technologies Sydney W. Head And Christopher H. Sterling. Houghton Mifflin Company, 1982.
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