Rosen, Lawrence R., author
Dow Jones-Irwin, 1974
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Bernard, Josef, author
Dow Jones-Irwin, 1986
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Richards, Robert William, author
Dow Jones-Irwin, 1986
Buku Referensi
Fardon, John, author
Platinum, 2007
Buku Referensi
Dean, Gordon, author
Alfred A. Knopf, 1957
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