editors, Tim Halliday, Kraig Adler, Christopher O'toole
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Buku Referensi
editors, Tim Halliday, Kraig Adler
Facts on File, 1994
Buku Referensi
Carr, Archie, author
Time Incorporated, 1970
Buku Teks
edited by Frederick W. Stehr
Kendall/Hunt, 1991
Buku Teks
edited by Frederick W. Stehr
Kendall/Hunt, 1987
Buku Teks