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Academic Press, 2002
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Macmillan Educational Company, 1990
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Grolier Incorporated, 1991
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Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
Buku Referensi
Edgar F. Borgatta, editor-in-chief, Marie L. Borgatta, managing editor
Macmillan, 1992
Buku Referensi