Encyclopedia of television; Volume 1
edited by Horace Newcomb
Fitzroy Dearborn Publishers, 1997
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Encyclopedia of television; Volume 3
edited by Horace Newcomb
Fitzroy Dearborn Publishers, 1997
 Buku Referensi
Encyclopedia of knowledge : volume 2
Grolier Incorporated, 1991
 Buku Referensi
Encyclopedia of bioethics : volume 2
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
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Encyclopedia of the future; Volume 2
edited by Goerge Thomas Kurian, Graham T.T. Molitor
Macmillan Library Reference USA, 1996
 Buku Referensi