Fritzsche, David J.
Business ethics: a global and managerial perspective
McGraw-Hill, 2005
 Buku Teks SO
Carman, Robert A.
Basic algebra : a guided approach
John Wiley & Sons, 1982
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Bormann, Ernest G.
Speech communication: a basic approach
Harper & Row, 1965
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Hamburg, Morris
Basic statistics : a modern approach
Harcourt Brace Jovanovick, 1985
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Michels, Leo
A basic math approach to concepts of chemistry
Brooks/Cole, 1996
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