Encyclopedia of television; Volume 1
edited by Horace Newcomb
Fitzroy Dearborn Publishers, 1997
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Encyclopedia of television; Volume 2
edited by Horace Newcomb
Fitzroy Dearborn Publishers, 1997
 Buku Referensi
Encyclopedia of knowledge : volume 3
Grolier Incorporated, 1991
 Buku Referensi
The Encyclopedia Americana : volume 3
Grolier, 1994
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Encyclopedia of bioethics : volume 3
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
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