Sumadi Suryabrata, author
RajaGrafindo Persada, 1998
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Ivan Taniputera, author
Ar-Ruzz, 2005
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Dyer, Wayne W., author
Pustaka delapratasa , 2007
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Larsen, Randy J., author
McGraw-Hill, 2005
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Meadow, Mary Jo, author
Kanisius , 1995
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